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US20150231759A1 - Chemical mechanical polishing conditioner with high performance - Google Patents

Chemical mechanical polishing conditioner with high performance Download PDF

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Publication number
US20150231759A1
US20150231759A1 US14/594,918 US201514594918A US2015231759A1 US 20150231759 A1 US20150231759 A1 US 20150231759A1 US 201514594918 A US201514594918 A US 201514594918A US 2015231759 A1 US2015231759 A1 US 2015231759A1
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US
United States
Prior art keywords
mechanical polishing
chemical mechanical
high performance
substrate
abrasive particles
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Abandoned
Application number
US14/594,918
Inventor
Jui-Lin Chou
Chia-Chun Wang
I-Tsao LIAO
Chia-Feng CHIU
Wen-Jen Liao
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Kinik Co
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Kinik Co
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Assigned to KINIK COMPANY reassignment KINIK COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, CHIA-CHUN, CHIU, CHIA-FENG, CHOU, JUI-LIN, LIAO, I-TSAO, LIAO, WEN-JEN
Publication of US20150231759A1 publication Critical patent/US20150231759A1/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/017Devices or means for dressing, cleaning or otherwise conditioning lapping tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12Dressing tools; Holders therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0072Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements

Definitions

  • the present invention relates to a chemical mechanical polishing conditioner, and more particularly to a chemical mechanical polishing conditioner including a plurality of abrasive particles which are performed surface treatments.
  • CMP Chemical mechanical polishing
  • a conditioner can be used to condition the surface of the polishing pad, such that the surface of the polishing pad is re-roughened and maintained at an optimum condition for polishing.
  • Taiwan Patent Issue No. 1306048 discloses that CMP pad dressers with superabrasive particles oriented into an attitude that controls CMP pad performance, and methods associated therewith are disclosed and described.
  • the controlled CMP pad performance may be selected to optimize CMP pad dressing rate and dresser wear.
  • a method for controlling CMP pad dresser performance in a CMP pad dresser as part of the pad dresser fabrication process, the pad dresser employing a plurality of superabrasive particles comprising: orienting the superabrasive particles into an attitude that provides an anticipated performance characteristic; and securing the securing the superabrasive particles to a substrate in said attitude.
  • tip orientations, crystalline forms of abrasive particles or the abrasive particles are mainly used to form different angles of inclination, and the tip orientations of the abrasive particles are controlled to promote the polishing performance of the conditioner.
  • the abrasive particles of the above-mentioned chemical mechanical polishing conditioner are limited to their crystal forms, such as hexoctahedron, so that cutting edge angles of the abrasive particles cannot avoid the fixing cutting edge angles due to their structures. Therefore, there is an urgent need for a chemical mechanical polishing conditioner with high performance, which is used to control profiles of each abrasive particle to achieve an optimum polishing performance.
  • An object of the present invention is to provide a chemical mechanical polishing conditioner with high performance, which is used to control profiles of each abrasive particle to achieve an optimum ability of cutting.
  • the abrasive particles can avoid limitations of their crystal form based on a condition of profiles of each abrasive particle to obtain an optimum cutting edge angle.
  • the present invention provides a chemical mechanical polishing conditioner with high performance, comprising: a substrate; a binding layer disposed on the substrate; and a plurality of abrasive particles fixed directly on the substrate by the binding layer, or each abrasive particle disposed on a metal fixing seat; wherein the substrate have a plurality of blind holes or a plurality of through holes, so that the metal fixing seats are installed into the blind holes or the through holes, and the metal fixing seat are fixed on the substrate by the binding layer; wherein the abrasive particles are treated by a surface processing treatment, so that the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations.
  • the cutting edge angles, crystal structures, tip heights, or tip orientations may be randomly varied based on the user's requirements or processing conditions; alternatively, the abrasive particles are not treated by a surface processing treatment, so that the abrasive particles are formed by a specific ration or a specific arrangement to control the surface characteristics of the polishing pad.
  • the present invention is different form a traditional chemical mechanical polishing conditioner of which the polishing performance are limited to their crystal forms, such as hexoctahedron, of the abrasive particles (artificial diamonds or synthetic diamond).
  • the chemical mechanical polishing conditioner with high performance of the present invention can be designed to the abrasive particles with specific profiles, so that the polishing performance is not limited to their crystal forms, such as hexoctahedron.
  • the present invention is different from the original artificial diamonds which can only have the cutting edge angle of 70 degree or 90 degree.
  • the cutting edge angle of theses abrasive particles may be randomly varied based on the user's requirements or polishing processing conditions; wherein the cutting edge angle of theses abrasive particles may be 30 degree to 150 degree, and in an aspect of the present invention, the cutting edge angle of theses abrasive particles may be 60 degree to 90 degree.
  • the crystal structure of these abrasive particles may be randomly varied based on a surface processing treatment and the user's requirements or polishing processing conditions; wherein the crystal structure of these abrasive particles may be a tetrahedron, a hexahedron, an octahedron, or the other shape with specific cutting function, but the present invention is not limited thereto.
  • the crystal structure of these abrasive particles may be a hexahedron.
  • the substrate has a plurality of blind holes or a plurality of through holes, so that the metal fixing seats are installed into the blind holes or the through holes.
  • the tip heights of these abrasive particles may be randomly varied based on the user's requirements or polishing conditions, so that these abrasive particles may have the same tip heights, or theses abrasive particles may have different tip heights.
  • these abrasive particles may have the same tip heights; alternatively, these abrasive particles are controlled by metal fixing seats with different protrusion heights, so that these abrasive particles have the same tip heights.
  • the abrasive particles may have different tip heights; wherein the abrasive particles may have different tips through surface treatments; alternatively, the abrasive particles are controlled by metal fixing seats with different protrusion heights, so that these abrasive particles have different tip heights.
  • each abrasive particle may be fixed on the metal fixing seats by an abrasive binding layer; wherein these abrasive particles may have plane bottoms or non-plane bottoms, and the metal fixing seat may have a plane top or blind holes at the top.
  • theses abrasive particles having plane bottoms may be disposed on the fixing seats having plane tops, so that theses abrasive particles having plane bottoms are corresponded with the metal fixing seats having the plane tops.
  • theses abrasive particles having plane bottoms also may be not disposed directly on the substrate instead of through the metal fixing seats.
  • theses abrasive particles having non-plane bottoms may be corresponded with the metal fixing seats having blind holes at the top, so that theses abrasive particles having non-plane bottoms are corresponded with the metal fixing seats having blind holes at the top.
  • these abrasive particles may be artificial diamonds, nature diamonds, polycrystalline diamonds or cubic boron nitride. In a preferred aspect of the present invention, the abrasive particles may be artificial diamonds. Furthermore, in the chemical mechanical polishing conditioner with high performance of the present invention, the abrasive particles may have a particle size of 30 to 2000 ⁇ m.
  • these abrasive particles disposed on the metal fixing seats may have larger particle sizes such as 800 ⁇ m; wherein the metal fixing seats may be designed as metal bars with cylindrical shapes and the external diameters of the metal fixing seats may be 1 mm to 10 mm, the external diameters of the metal fixing seats are preferably 3 mm; therefore, 60 to 70 metal fixing seats may generally be installed into the substrate of the conditioner having external diameters of 4 inch.
  • these abrasive particles are fixed directly on the substrate by the binding layer; alternatively, each abrasive particle is disposed on the metal fixing seat and the metal fixing seat is fixed on the substrate by the binding layer; wherein the compositions of the binding layer may be varied based on the polishing conditions and requirements, which includes: a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material, but the present invention is not limited thereto.
  • the polymer material can be epoxy resin, polyester resin, polyacrylic resin, or phenolic resin
  • the brazing material can be at least one selected from the group consisting of iron, cobalt, nickel, chromium, manganese, silicon, aluminum, and combinations thereof.
  • the compositions of the binding layer are preferably epoxy resin.
  • each abrasive particle may be fixed on the metal fixing seat by the abrasive binding layer; wherein the compositions of the abrasive binding layer may be varied based on the polishing conditions and requirements, which includes: a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material, but the present invention is not limited thereto.
  • the polymer material can be epoxy resin, polyester resin, polyacrylic resin, or phenolic resin
  • the brazing material can be at least one selected from the group consisting of iron, cobalt, nickel, chromium, manganese, silicon, aluminum, and combinations thereof.
  • the compositions of the binding layer are preferably nickel-based metal brazing material.
  • the materials and sizes of the substrate may be varied based on the polishing conditions and requirements; wherein the materials of the substrate can be stainless steel substrate, mold steel substrate, metal alloy substrate, ceramic material substrate or polymer material substrate or combinations thereof, but the present invention is not be limited thereto.
  • the material of the substrate may be a stainless steel substrate.
  • the substrate may have a plurality of blind holes, so that the metal fixing seats may be installed into each blind hole.
  • Another object of the present invention is to provide a method for manufacturing chemical mechanical polishing conditioner with high performance, the method for manufacturing chemical mechanical polishing conditioner may control the figures of each abrasive particle to achieve the optimum ability of cutting. Besides, theses abrasive particles can avoid limitations of theirs crystal forms based on a condition of profiles of a single abrasive particle to obtain an optimum cutting edge angle.
  • the present invention is to provide a method for manufacturing chemical mechanical polishing conditioner with high performance, comprising: providing a plurality of abrasive particles and a substrate having a binding layer; providing a surface processing treatment to make the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations. Further, each abrasive particle may be fixed on the substrate by the binding layer; alternatively, each abrasive particle is disposed on the metal fixing seat and the metal fixing seat is fixed on the substrate by the binding layer.
  • the surface processing treatment may be a mechanical polishing method, a chemical etching method, or a laser processing method; in an aspect of the present invention, the surface processing treatment may be a mechanical polishing method.
  • the fixing method of the binding layer may be a ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method, but the present invention is not limited thereto.
  • the fixing method of the binding layer is the polymer hardening method.
  • each abrasive particle is disposed on the metal fixing seat, and the metal fixing seats are fixed on the substrate by the binding layer; wherein each abrasive particle is fixed on the metal fixing seat by the abrasive binding layer, and the fixing method of the abrasive binding layer may be a ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method.
  • the fixing method of the abrasive binding layer is metal brazing method.
  • FIG. 1A shows a block flow diagram of a chemical mechanical polishing conditioner with high performance of the present invention.
  • FIG. 1B shows a schematic diagram of a chemical mechanical polishing conditioner with high performance of the present invention.
  • FIGS. 2A to 2D show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 2 of the present invention.
  • FIGS. 3A to 3D show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 3 of the present invention.
  • FIG. 1A shows a block flow diagram of a chemical mechanical polishing conditioner with high performance of the present invention
  • FIG. 1B shows a schematic diagram of a chemical mechanical polishing conditioner with high performance of the present invention
  • these abrasive particles 12 are disposed on a metal fixing seat (not shown); wherein the these abrasive particles 12 are artificial diamonds with particle size of 300 ⁇ m.
  • these abrasive particles 12 are performed a surface processing treatment, so that these abrasive particles have specific cutting edge angle ( ⁇ ) of 90 degree.
  • cutting edge angle
  • theses abrasive particles can avoid limitations of theirs crystal forms based on a condition of figure of a single abrasive particle to obtain an optimum cutting edge angle ( ⁇ ), and the crystal structures of these abrasive particles 12 are hexahedrons.
  • the cutting edge angle ( ⁇ ) and the crystal structures may be randomly varied based on the user's requirements or processing conditions.
  • these abrasive particles 12 are separated from the metal fixing seats (not shown); finally, a substrate 10 made of stainless steel material and a binding layer 11 made of nickel-based metallic brazing material are provided, and these abrasive particles 12 are fixed on the binding layer 12 by a heat brazing method, and then the binding layer is fixed on the substrate 10 to form a chemical mechanical polishing conditioner 1 with high performance of the present invention, as shown in FIG. 1B ; wherein these abrasive particles 12 are disposed by using a known diamond distribution technique (for example, template distribution), and the spacing and arrangement of the abrasive particles 12 are controlled by the template (not shown in figures).
  • a known diamond distribution technique for example, template distribution
  • these abrasive particles 12 have the same tip heights and these abrasive particles 12 all have tips upwards to form tip directionality; alternatively, the abrasive particles 12 are modified based on the user's requirements or polishing processing conditions to have the same tip directionality or different tip directionality.
  • FIG. 2 shows schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 2 of the present invention.
  • the device of the chemical mechanical polishing conditioner 20 with high performance of Example 2 is substantially the same as the above Example 1, but the differences are that the abrasive particles 12 of Example 1 are fixed directly on the substrate by the binding layer 11 , and the abrasive particles 22 of Example 2 are disposed on the metal fixing seat 23 .
  • each abrasive particle 22 is disposed on the metal fixing seat 23 having plane top; wherein these abrasive particles 22 are artificial diamonds with particle size of 800 ⁇ m.
  • the metal fixing seat 23 having the plane top is a cylinder figure of which the external diameter is 3 mm and each abrasive particle 22 is fixed on the metal fixing seat 23 having plane top by the abrasive binding layer (not shown in figures) made of metal brazing alloy.
  • these abrasive particles 22 are performed a surface processing treatment, so that abrasive particles 22 have cutting edge angle ( ⁇ ) of 90 degree.
  • the cutting edge angle may be randomly varied based on the user's requirements or polishing processing conditions.
  • the metal fixing seat 23 with the plane top is installed into the substrate with a plurality of blind holes, and the metal fixing seat 23 with the plane top is fixed on the substrate 20 by the binding layer 21 , as shown in FIG. 2C ; alternatively, please refer to FIG. 2D , the metal fixing seat 23 with the plane top is installed into the substrate with a plurality of through holes, and the metal fixing seat 23 with the plane top is fixed on the substrate 20 by the binding layer 21 to form a chemical mechanical polishing conditioner 2 with high performance of the present invention.
  • the binding layer 21 is not present on the front of the substrate, in an aspect of the present invention, 70 metal fixing seats 23 with the plane tops may installed into the 4 inch substrate.
  • FIGS. 3A to 3C show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 3 of the present invention.
  • the device of the chemical mechanical polishing conditioner with high performance of Example 3 is substantially the same as the above Example 2, but the differences are that these abrasive particles having plane bottoms are disposed on the metal fixing seat with plane tops in Example 2, but these abrasive particles having non-plane bottoms are disposed on the metal fixing seat with blind holes at top, so that these abrasive particles having non-plane bottoms are corresponded to the metal fixing seat with blind holes at top.
  • theses abrasive particles 32 having non-plane bottoms are disposed on the metal fixing seat 33 with blind holes at top; wherein theses abrasive particles 32 are artificial diamonds with particle size of 800 ⁇ m, and the metal fixing seats 33 are cylinder figures of which the external diameter is 3 mm, and each abrasive particles 32 is fixed on the metal fixing seat 33 having blind holes at top by the abrasive binding layer (not shown in figures) made of metal brazing alloy. Further, please refer to FIG.
  • theses abrasive particles 32 are performed a surface processing treatment, so that the abrasive particles 32 have cutting edge angle ( ⁇ ) of 90 degree; alternatively, cutting edge angle of these abrasive particles 22 may be randomly varied based on the user's requirements or processing conditions.
  • FIG. 3C theses abrasive particles 32 with non-plane bottoms and the metal fixing seats with blind holes at top are installed into the substrate having a plurality of blind holes 34 , and the metal fixing seats 33 with blind holes at top are fixed on the substrate by the binding layer 31 to form the chemical mechanical polishing conditioner 3 with high performance of the present invention.
  • FIG. 3C theses abrasive particles 32 with non-plane bottoms and the metal fixing seats with blind holes at top are installed into the substrate having a plurality of blind holes 34 , and the metal fixing seats 33 with blind holes at top are fixed on the substrate by the binding layer 31 to form the chemical mechanical polishing conditioner 3 with high performance of the present invention.
  • FIG. 3C please refer to FIG.
  • the metal fixing seat 33 having plane top is installed into the substrate having a plurality of through holes 35 , and the metal fixing seat 33 having plane top is fixed on the substrate 30 by the binding layer 31 to form the chemical mechanical polishing conditioner 3 with high performance of the present invention.
  • the binding layer 31 is not present on the front of the substrate; besides, these abrasive particles 32 are controlled by the metal fixing seats so that have these abrasive particles 32 have the same tip heights or different tip heights.
  • these abrasive particles are disposed on the substrate; and in another Example, these abrasive particles are disposed on the metal fixing seats.
  • the cutting edge angles, crystal structures, tip heights or tip orientations may be randomly varied based on the user's requirements or processing conditions in the two Examples, thereby controlling the figures of each abrasive particle, so that these abrasive particles avoid hexoctahedron to manufacture a predetermined form; therefore, an ideal cutting edge angle is obtained to achieve an optimum polishing performance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The present invention relates to a chemical mechanical polishing conditioner with high performance, comprising a substrate; a binding layer disposed on the substrate; and a plurality of abrasive particles fixed directly on the substrate by the binding layer, or each abrasive particle disposed on a metal fixing seat and the substrate have a plurality of blind holes and a plurality of through holes, so that the metal fixing seats are installed into the blind holes or the through holes, and the metal fixing seat fixed on the substrate by the binding layer; wherein the abrasive particles are treated by a surface processing treatment to make the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations. Therefore, the present invention can control the profile of each abrasive particle to accomplish the best polishing performance.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • This application claims the benefits of the Taiwan Patent Application Serial Number 103105288, filed on Feb. 18, 2014, the subject matter of which is incorporated herein by reference.
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a chemical mechanical polishing conditioner, and more particularly to a chemical mechanical polishing conditioner including a plurality of abrasive particles which are performed surface treatments.
  • 2. Description of Related Art
  • Chemical mechanical polishing (CMP) is a common polishing process in various industries, which can be used to grind the surfaces of various articles, including ceramics, silicon, glass, quartz, or a metal chip. In addition, with the rapid development of integrated circuits, chemical mechanical polishing becomes one of the common techniques for wafer planarization because it can achieve an object of whole planarization.
  • During the chemical mechanical polishing process of semiconductor, impurities or uneven structure on the surface of a wafer are removed by contacting the wafer (or the other semiconductor elements) with a polishing pad and using a polishing liquid if necessary, through the chemical reaction and mechanical force. When the polishing pad has been used for a certain period of time, the polishing performance and efficiency are reduced because the debris produced in the polishing process may accumulate on the surface of the polishing pad. Therefore, a conditioner can be used to condition the surface of the polishing pad, such that the surface of the polishing pad is re-roughened and maintained at an optimum condition for polishing. In the process for manufacturing a conditioner, it is necessary to dispose an abrasive layer by mixing abrasive particles and a binding layer on the substrate surface, and to fix the abrasive layer to the surface of the substrate by brazing or sintering methods.
  • In the known technology, such as Taiwan Patent Issue No. 1306048, it discloses that CMP pad dressers with superabrasive particles oriented into an attitude that controls CMP pad performance, and methods associated therewith are disclosed and described. The controlled CMP pad performance may be selected to optimize CMP pad dressing rate and dresser wear. Further, a method for controlling CMP pad dresser performance in a CMP pad dresser as part of the pad dresser fabrication process, the pad dresser employing a plurality of superabrasive particles comprising: orienting the superabrasive particles into an attitude that provides an anticipated performance characteristic; and securing the securing the superabrasive particles to a substrate in said attitude.
  • Besides, in the other known technology, such as Japanese Patent Publication No. 2006130586, it discloses that among a number of diamond abrasive grains, a group of diamond abrasive grains having a higher percentage content of diamond abrasive grains where the proportion of area occupied by crystal orientation 111 face is larger than that of the other faces is selected, and this group of diamond abrasive grains are dispersed in a plating liquid to be plated on the surface 2 of a base material 1 dipped in a plating solution, whereby among a number of diamond abrasive grains plated on the surface 2 of the base material 1, the proportion of diamond abrasive grains A1, A2, A4 to A6, A8, A9, the crystal orientation 111 faces (a) of which are oriented substantially parallel to the surface 2 of the base material 1 ranges from 65 to 95%, and the X-ray reflection intensity of the crystal orientation 111 face of the diamond abrasive grains is 2500 CPS or more.
  • However, in the above-mentioned chemical mechanical polishing conditioner, tip orientations, crystalline forms of abrasive particles or the abrasive particles are mainly used to form different angles of inclination, and the tip orientations of the abrasive particles are controlled to promote the polishing performance of the conditioner. But, the abrasive particles of the above-mentioned chemical mechanical polishing conditioner are limited to their crystal forms, such as hexoctahedron, so that cutting edge angles of the abrasive particles cannot avoid the fixing cutting edge angles due to their structures. Therefore, there is an urgent need for a chemical mechanical polishing conditioner with high performance, which is used to control profiles of each abrasive particle to achieve an optimum polishing performance.
  • SUMMARY OF THE INVENTION
  • An object of the present invention is to provide a chemical mechanical polishing conditioner with high performance, which is used to control profiles of each abrasive particle to achieve an optimum ability of cutting. Besides, the abrasive particles can avoid limitations of their crystal form based on a condition of profiles of each abrasive particle to obtain an optimum cutting edge angle.
  • To achieve the above object, the present invention provides a chemical mechanical polishing conditioner with high performance, comprising: a substrate; a binding layer disposed on the substrate; and a plurality of abrasive particles fixed directly on the substrate by the binding layer, or each abrasive particle disposed on a metal fixing seat; wherein the substrate have a plurality of blind holes or a plurality of through holes, so that the metal fixing seats are installed into the blind holes or the through holes, and the metal fixing seat are fixed on the substrate by the binding layer; wherein the abrasive particles are treated by a surface processing treatment, so that the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations. Further, the cutting edge angles, crystal structures, tip heights, or tip orientations may be randomly varied based on the user's requirements or processing conditions; alternatively, the abrasive particles are not treated by a surface processing treatment, so that the abrasive particles are formed by a specific ration or a specific arrangement to control the surface characteristics of the polishing pad. The present invention is different form a traditional chemical mechanical polishing conditioner of which the polishing performance are limited to their crystal forms, such as hexoctahedron, of the abrasive particles (artificial diamonds or synthetic diamond). The chemical mechanical polishing conditioner with high performance of the present invention can be designed to the abrasive particles with specific profiles, so that the polishing performance is not limited to their crystal forms, such as hexoctahedron.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, the present invention is different from the original artificial diamonds which can only have the cutting edge angle of 70 degree or 90 degree. The cutting edge angle of theses abrasive particles may be randomly varied based on the user's requirements or polishing processing conditions; wherein the cutting edge angle of theses abrasive particles may be 30 degree to 150 degree, and in an aspect of the present invention, the cutting edge angle of theses abrasive particles may be 60 degree to 90 degree. Besides, in the chemical mechanical polishing conditioner with high performance of the present invention, the crystal structure of these abrasive particles may be randomly varied based on a surface processing treatment and the user's requirements or polishing processing conditions; wherein the crystal structure of these abrasive particles may be a tetrahedron, a hexahedron, an octahedron, or the other shape with specific cutting function, but the present invention is not limited thereto. In an aspect of the present invention, the crystal structure of these abrasive particles may be a hexahedron. Besides, in the chemical mechanical polishing conditioner with high performance of the present invention, the substrate has a plurality of blind holes or a plurality of through holes, so that the metal fixing seats are installed into the blind holes or the through holes.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, the tip heights of these abrasive particles may be randomly varied based on the user's requirements or polishing conditions, so that these abrasive particles may have the same tip heights, or theses abrasive particles may have different tip heights. In an aspect of the present invention, these abrasive particles may have the same tip heights; alternatively, these abrasive particles are controlled by metal fixing seats with different protrusion heights, so that these abrasive particles have the same tip heights. In another aspect of the present invention, the abrasive particles may have different tip heights; wherein the abrasive particles may have different tips through surface treatments; alternatively, the abrasive particles are controlled by metal fixing seats with different protrusion heights, so that these abrasive particles have different tip heights.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, each abrasive particle may be fixed on the metal fixing seats by an abrasive binding layer; wherein these abrasive particles may have plane bottoms or non-plane bottoms, and the metal fixing seat may have a plane top or blind holes at the top. In an aspect of the present invention, theses abrasive particles having plane bottoms may be disposed on the fixing seats having plane tops, so that theses abrasive particles having plane bottoms are corresponded with the metal fixing seats having the plane tops. Besides, theses abrasive particles having plane bottoms also may be not disposed directly on the substrate instead of through the metal fixing seats. On the other hand, theses abrasive particles having non-plane bottoms may be corresponded with the metal fixing seats having blind holes at the top, so that theses abrasive particles having non-plane bottoms are corresponded with the metal fixing seats having blind holes at the top.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, these abrasive particles may be artificial diamonds, nature diamonds, polycrystalline diamonds or cubic boron nitride. In a preferred aspect of the present invention, the abrasive particles may be artificial diamonds. Furthermore, in the chemical mechanical polishing conditioner with high performance of the present invention, the abrasive particles may have a particle size of 30 to 2000 μm. In an aspect of the present invention, these abrasive particles disposed on the metal fixing seats may have larger particle sizes such as 800 μm; wherein the metal fixing seats may be designed as metal bars with cylindrical shapes and the external diameters of the metal fixing seats may be 1 mm to 10 mm, the external diameters of the metal fixing seats are preferably 3 mm; therefore, 60 to 70 metal fixing seats may generally be installed into the substrate of the conditioner having external diameters of 4 inch.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, these abrasive particles are fixed directly on the substrate by the binding layer; alternatively, each abrasive particle is disposed on the metal fixing seat and the metal fixing seat is fixed on the substrate by the binding layer; wherein the compositions of the binding layer may be varied based on the polishing conditions and requirements, which includes: a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material, but the present invention is not limited thereto. Besides, in the chemical mechanical polishing conditioner with high performance of the present invention, the polymer material can be epoxy resin, polyester resin, polyacrylic resin, or phenolic resin, and the brazing material can be at least one selected from the group consisting of iron, cobalt, nickel, chromium, manganese, silicon, aluminum, and combinations thereof. In an aspect of the present invention, the compositions of the binding layer are preferably epoxy resin.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, each abrasive particle may be fixed on the metal fixing seat by the abrasive binding layer; wherein the compositions of the abrasive binding layer may be varied based on the polishing conditions and requirements, which includes: a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material, but the present invention is not limited thereto. Besides, in the chemical mechanical polishing conditioner with high performance of the present invention, the polymer material can be epoxy resin, polyester resin, polyacrylic resin, or phenolic resin, and the brazing material can be at least one selected from the group consisting of iron, cobalt, nickel, chromium, manganese, silicon, aluminum, and combinations thereof. In an aspect of the present invention, the compositions of the binding layer are preferably nickel-based metal brazing material.
  • Besides, in the chemical mechanical polishing conditioner with high performance of the present invention, the materials and sizes of the substrate may be varied based on the polishing conditions and requirements; wherein the materials of the substrate can be stainless steel substrate, mold steel substrate, metal alloy substrate, ceramic material substrate or polymer material substrate or combinations thereof, but the present invention is not be limited thereto. In a preferred aspect of the present invention, the material of the substrate may be a stainless steel substrate. Further, in the chemical mechanical polishing conditioner with high performance of the present invention, the substrate may have a plurality of blind holes, so that the metal fixing seats may be installed into each blind hole.
  • Another object of the present invention is to provide a method for manufacturing chemical mechanical polishing conditioner with high performance, the method for manufacturing chemical mechanical polishing conditioner may control the figures of each abrasive particle to achieve the optimum ability of cutting. Besides, theses abrasive particles can avoid limitations of theirs crystal forms based on a condition of profiles of a single abrasive particle to obtain an optimum cutting edge angle.
  • To achieve the above object, the present invention is to provide a method for manufacturing chemical mechanical polishing conditioner with high performance, comprising: providing a plurality of abrasive particles and a substrate having a binding layer; providing a surface processing treatment to make the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations. Further, each abrasive particle may be fixed on the substrate by the binding layer; alternatively, each abrasive particle is disposed on the metal fixing seat and the metal fixing seat is fixed on the substrate by the binding layer.
  • In the method for manufacturing chemical mechanical polishing conditioner with high performance, the surface processing treatment may be a mechanical polishing method, a chemical etching method, or a laser processing method; in an aspect of the present invention, the surface processing treatment may be a mechanical polishing method. Besides, in the method for manufacturing chemical mechanical polishing conditioner with high performance, the fixing method of the binding layer may be a ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method, but the present invention is not limited thereto. In an aspect of the present invention, the fixing method of the binding layer is the polymer hardening method.
  • In the method for manufacturing chemical mechanical polishing conditioner with high performance, each abrasive particle is disposed on the metal fixing seat, and the metal fixing seats are fixed on the substrate by the binding layer; wherein each abrasive particle is fixed on the metal fixing seat by the abrasive binding layer, and the fixing method of the abrasive binding layer may be a ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method. In an aspect of the present invention, the fixing method of the abrasive binding layer is metal brazing method.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
  • FIG. 1A shows a block flow diagram of a chemical mechanical polishing conditioner with high performance of the present invention.
  • FIG. 1B shows a schematic diagram of a chemical mechanical polishing conditioner with high performance of the present invention.
  • FIGS. 2A to 2D show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 2 of the present invention.
  • FIGS. 3A to 3D show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 3 of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Hereinafter, the actions and the effects of the present invention will be explained in more detail via specific examples of the invention. However, these examples are merely illustrative of the present invention and the scope of the invention should not be construed to be defined thereby.
  • Example 1
  • Please refer to FIGS. 1A and 1B, FIG. 1A shows a block flow diagram of a chemical mechanical polishing conditioner with high performance of the present invention, and FIG. 1B shows a schematic diagram of a chemical mechanical polishing conditioner with high performance of the present invention. Please refer to FIGS. 1A and 1B, in the chemical mechanical polishing conditioner with high performance according to Example 1 of the present invention, first, these abrasive particles 12 are disposed on a metal fixing seat (not shown); wherein the these abrasive particles 12 are artificial diamonds with particle size of 300 μm. Secondly, these abrasive particles 12 are performed a surface processing treatment, so that these abrasive particles have specific cutting edge angle (θ) of 90 degree. Please refer to FIG. 1B, theses abrasive particles can avoid limitations of theirs crystal forms based on a condition of figure of a single abrasive particle to obtain an optimum cutting edge angle (θ), and the crystal structures of these abrasive particles 12 are hexahedrons. The cutting edge angle (θ) and the crystal structures may be randomly varied based on the user's requirements or processing conditions. Further, these abrasive particles 12 are separated from the metal fixing seats (not shown); finally, a substrate 10 made of stainless steel material and a binding layer 11 made of nickel-based metallic brazing material are provided, and these abrasive particles 12 are fixed on the binding layer 12 by a heat brazing method, and then the binding layer is fixed on the substrate 10 to form a chemical mechanical polishing conditioner 1 with high performance of the present invention, as shown in FIG. 1B; wherein these abrasive particles 12 are disposed by using a known diamond distribution technique (for example, template distribution), and the spacing and arrangement of the abrasive particles 12 are controlled by the template (not shown in figures). Besides, these abrasive particles 12 have the same tip heights and these abrasive particles 12 all have tips upwards to form tip directionality; alternatively, the abrasive particles 12 are modified based on the user's requirements or polishing processing conditions to have the same tip directionality or different tip directionality.
  • Example 2
  • Please refer to FIG. 2, FIG. 2 shows schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 2 of the present invention. The device of the chemical mechanical polishing conditioner 20 with high performance of Example 2 is substantially the same as the above Example 1, but the differences are that the abrasive particles 12 of Example 1 are fixed directly on the substrate by the binding layer 11, and the abrasive particles 22 of Example 2 are disposed on the metal fixing seat 23. Please refer to FIG. 2A, each abrasive particle 22 is disposed on the metal fixing seat 23 having plane top; wherein these abrasive particles 22 are artificial diamonds with particle size of 800 μm. Besides, the metal fixing seat 23 having the plane top is a cylinder figure of which the external diameter is 3 mm and each abrasive particle 22 is fixed on the metal fixing seat 23 having plane top by the abrasive binding layer (not shown in figures) made of metal brazing alloy. Further, please refer to FIG. 2B, these abrasive particles 22 are performed a surface processing treatment, so that abrasive particles 22 have cutting edge angle (θ) of 90 degree. The cutting edge angle may be randomly varied based on the user's requirements or polishing processing conditions. Finally, please refer to FIG. 2C, the metal fixing seat 23 with the plane top is installed into the substrate with a plurality of blind holes, and the metal fixing seat 23 with the plane top is fixed on the substrate 20 by the binding layer 21, as shown in FIG. 2C; alternatively, please refer to FIG. 2D, the metal fixing seat 23 with the plane top is installed into the substrate with a plurality of through holes, and the metal fixing seat 23 with the plane top is fixed on the substrate 20 by the binding layer 21 to form a chemical mechanical polishing conditioner 2 with high performance of the present invention. Please refer to FIG. 2D, the binding layer 21 is not present on the front of the substrate, in an aspect of the present invention, 70 metal fixing seats 23 with the plane tops may installed into the 4 inch substrate.
  • Example 3
  • Please refer to FIGS. 3A to 3C, FIGS. 3A to 3C show schematic diagrams of the chemical mechanical polishing conditioner with high performance according to Example 3 of the present invention. The device of the chemical mechanical polishing conditioner with high performance of Example 3 is substantially the same as the above Example 2, but the differences are that these abrasive particles having plane bottoms are disposed on the metal fixing seat with plane tops in Example 2, but these abrasive particles having non-plane bottoms are disposed on the metal fixing seat with blind holes at top, so that these abrasive particles having non-plane bottoms are corresponded to the metal fixing seat with blind holes at top. Please refer to FIG. 3A, first, theses abrasive particles 32 having non-plane bottoms are disposed on the metal fixing seat 33 with blind holes at top; wherein theses abrasive particles 32 are artificial diamonds with particle size of 800 μm, and the metal fixing seats 33 are cylinder figures of which the external diameter is 3 mm, and each abrasive particles 32 is fixed on the metal fixing seat 33 having blind holes at top by the abrasive binding layer (not shown in figures) made of metal brazing alloy. Further, please refer to FIG. 3B, theses abrasive particles 32 are performed a surface processing treatment, so that the abrasive particles 32 have cutting edge angle (θ) of 90 degree; alternatively, cutting edge angle of these abrasive particles 22 may be randomly varied based on the user's requirements or processing conditions. Finally, please refer to FIG. 3C, theses abrasive particles 32 with non-plane bottoms and the metal fixing seats with blind holes at top are installed into the substrate having a plurality of blind holes 34, and the metal fixing seats 33 with blind holes at top are fixed on the substrate by the binding layer 31 to form the chemical mechanical polishing conditioner 3 with high performance of the present invention. Alternatively, please refer to FIG. 3D, the metal fixing seat 33 having plane top is installed into the substrate having a plurality of through holes 35, and the metal fixing seat 33 having plane top is fixed on the substrate 30 by the binding layer 31 to form the chemical mechanical polishing conditioner 3 with high performance of the present invention. Please refer to FIG. 3D, the binding layer 31 is not present on the front of the substrate; besides, these abrasive particles 32 are controlled by the metal fixing seats so that have these abrasive particles 32 have the same tip heights or different tip heights.
  • In the chemical mechanical polishing conditioner with high performance of the present invention, in an Example, these abrasive particles are disposed on the substrate; and in another Example, these abrasive particles are disposed on the metal fixing seats. The cutting edge angles, crystal structures, tip heights or tip orientations may be randomly varied based on the user's requirements or processing conditions in the two Examples, thereby controlling the figures of each abrasive particle, so that these abrasive particles avoid hexoctahedron to manufacture a predetermined form; therefore, an ideal cutting edge angle is obtained to achieve an optimum polishing performance.
  • It should be understood that these examples are merely illustrative of the present invention and the scope of the invention should not be construed to be defined thereby, and the scope of the present invention will be limited only by the appended claims.

Claims (22)

1. A chemical mechanical polishing conditioner with high performance, comprising:
a substrate;
a binding layer disposed on the substrate; and
a plurality of abrasive particles fixed directly on the substrate by the binding layer, or each abrasive particle disposed on a metal fixing seat, and the substrate having a plurality of blind holes or a plurality of through holes, so that the metal fixing seat is installed into these blind holes or these through holes, and the metal fixing seat is fixed on the substrate by the binding layer;
wherein the abrasive particles are performed a surface processing treatment, so that these abrasive particles have specific cutting edge angles, crystal structures, tip heights or tip orientations, or these abrasive particles are not performed a processing treatment.
2. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the cutting edge angles of these abrasive particles are 30 degrees to 150 degrees.
3. The chemical mechanical polishing conditioner with high performance of claim 2, wherein the cutting edge angles of these abrasive particles are 60 degrees or 90 degrees.
4. The chemical mechanical polishing conditioner with high performance of claim 1, wherein crystal structure of these abrasive particles is a tetrahedron, a hexahedron, an octahedron or the other shape with specific cutting function.
5. The chemical mechanical polishing conditioner with high performance of claim 1, wherein these abrasive particles have the same tip heights.
6. The chemical mechanical polishing conditioner with high performance of claim 1, wherein these abrasive particles have different tip heights.
7. The chemical mechanical polishing conditioner with high performance of claim 1, wherein each abrasive particle is fixed on the metal fixing seat by the abrasive binding layer.
8. The chemical mechanical polishing conditioner with high performance of claim 1, wherein these abrasive particles have plane bottom or non-plane bottom.
9. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the metal fixing seat has a plane top or a blind hole at the top.
10. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the abrasive particles are artificial diamonds, nature diamonds, polycrystalline diamonds or cubic boron nitride.
11. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the abrasive particles have a particle size of 30 to 2000 μm.
12. The chemical mechanical polishing conditioner with high performance of claim 1, wherein a composition of the binding layer is made of a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material.
13. The chemical mechanical polishing conditioner with high performance of claim 7, wherein a composition of the abrasive binding layer is made of a ceramic material, a brazing material, an electroplating material, a metallic material, or a polymer material.
14. The chemical mechanical polishing conditioner with high performance of claim 12, wherein the brazing material is at least one selected from the group consisting of iron, cobalt, nickel, chromium, manganese, silicon, aluminum, and combinations thereof.
15. The chemical mechanical polishing conditioner with high performance of claim 12, wherein the polymer material is epoxy resin, polyester resin, polyacrylic resin, phenolic resin.
16. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the substrate is made of stainless steel substrate, mold steel substrate, metal alloy substrate, ceramic material substrate or polymer material substrate or combinations thereof.
17. The chemical mechanical polishing conditioner with high performance of claim 1, wherein the substrate has a plurality of blind holes, so that the metal fixing seat is installed into each blind hole.
18. A method for manufacturing chemical mechanical polishing conditioner with high performance, comprising:
providing a plurality of abrasive particles and a substrate having a binding layer;
providing a surface processing treatment to make the abrasive particles have specific cutting edge angles, crystal structures, tip heights, or tip orientations; and
fixing directly each abrasive particle on the substrate by the binding layer; or fixing each abrasive particle on the metal fixing seat, so that the metal fixing seat is fixed on the substrate by the binding layer.
19. The method for manufacturing chemical mechanical polishing conditioner with high performance of claim 18, wherein the surface process treatment is a mechanical polishing method, a chemical etching method, or a laser processing method.
20. The method for manufacturing chemical mechanical polishing conditioner with high performance of claim 18, wherein a fixing method of the binding layer is ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method.
21. The method for manufacturing chemical mechanical polishing conditioner with high performance of claim 18, wherein each abrasive particle is fixed on the metal fixing seat by the abrasive binding layer.
22. The method for manufacturing chemical mechanical polishing conditioner with high performance of claim 21, wherein the fixing method of the abrasive binding layer is ceramic sintering method, a brazing method, an electroplating method, a metal sintering method, or a polymer hardening method.
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