JPH07326845A - Direct lithography device - Google Patents

Abstract

PURPOSE:To make it possible to draw a pattern on a cylindrical surface by a method wherein a pattern is directly drawn on a cylindrical substrate, which is used as a work, where a conductive pattern will be formed while the substrate is being rotated in circumferential direction. CONSTITUTION:A conductive pattern is formed along the axial direction of a work 5 by moving an X-axis table 2 along the axial direction of the work 5 and by discharging conductive paste from a direct lithography head 16. Also, the work 5 is rotated by driving a motor 11, and the lithography starting position of the conductor pattern can be moved to the circumferential direction of the work 5. Also, a conductor pattern can be formed along the circumferential direction of the work 5 by discharging the conductive paste while the work 5 is being rotated. As a result, an optional conductor pattern can be formed on a cylindrical substrate 5. Also, the width of the conductor pattern of the curved part can be appropriately formed by controlling the speed of the lithography and the discharging quantity of paste on the curved part when a conductor pattern, having a curved part, is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus used for manufacturing a thick film circuit, and more particularly to a direct drawing apparatus for discharging a conductive paste onto a substrate to form a layer.

[0002]

2. Description of the Related Art Screen printing is generally used as a technique for forming a thick film circuit on a substrate. However, since it is necessary to make a screen for each circuit, it is suitable for manufacturing a small number of multi-model products. There is a problem that there is no. On the other hand, as a method that has been recently used, there is a direct drawing method in which a thick film circuit is directly formed on a substrate without using a screen.

In this direct drawing method, as shown in FIG. 8, a work, that is, a substrate 6 is placed on an XY table 62 movably provided in an XY direction on a fixed base 61.
3 is attached and CAD (computer aided)
The position of the XY table 62 is controlled by the conductive pattern data created on the substrate 63 to move the substrate 63, and the conductive paste is discharged from the paste discharge port 64a of the direct drawing head 64 provided near the surface of the substrate 63. Is directly discharged onto the substrate 63 to form a circuit (for example, Kato, “Hybrid IC pattern direct writing device”, Electronic Materials, May 1989, pp.85-92).
reference). Unlike the printing method such as screen printing, this direct drawing method does not require plate making, and therefore has an advantage of being able to take advantage of the advantage particularly in applications in which trial and error are frequent. Further, there is an advantage that the manufacturing cost can be reduced because the number of steps is small.

On the other hand, the thick film circuit may not only be formed on a flat substrate, but it may be necessary to form the thick film circuit on a non-planar substrate. For example, JP-A-58-607
As disclosed in Japanese Unexamined Patent Publication No. 70-70, in a developing device of an electrophotographic apparatus, conductive dispersed or divided electrodes are formed on the surface of a cylindrical developing sleeve that rotates in proximity to a photoconductor and conveys a developer. There may be a need. Further, as disclosed in Japanese Patent Application Laid-Open No. 58-221870, the surface of the cylindrical substrate is also formed when a plurality of fine electrodes for forming a charge pattern are formed on the surface of the toner carrier in the developing device. It is necessary to form an electrode on.

[0005]

However, in the conventional direct writing apparatus for realizing the above-mentioned direct writing method, only forming a thick film circuit on a plane is taken into consideration. Drawing was impossible.

Therefore, an object of the present invention is to provide a direct drawing apparatus capable of drawing on a cylindrical surface.

[0007]

The present invention, in a direct drawing apparatus for forming a conductive pattern on a base material by directly discharging a conductive paste onto the base material, holds a cylindrical base material as a work. A work holding unit, a movable table that moves the work holding unit along the axial direction of the work, a motor that rotates the work with the shaft of the work as a rotation axis, and the conductive paste is discharged onto the work. A drawing head having a paste ejection port, a paste ejection amount control means for controlling the ejection amount of paste in the drawing head, a conductive pattern setting unit for setting a conductive pattern to be formed on the work, and a drawing condition setting Drawing condition setting unit, the conductive pattern set by the conductive pattern setting unit, and the drawing condition set by the drawing condition setting unit Therefore; and a drawing control unit that controls the discharge amount of the paste from the moving speed and the drawing head of the movable table and the rotational speed of the motor.

[0008]

The conductive pattern is formed along the axial direction of the work by moving the movable table along the axial direction of the work and discharging the conductive paste from the drawing head. Further, the work is rotated by rotating the motor, and the drawing start position of the conductive pattern can be moved in the circumferential direction of the work. Further, the conductive pattern is formed along the circumferential direction of the work by discharging the conductive paste while rotating the work. This makes it possible to form an arbitrary conductive pattern on the cylindrical base material.

Further, in the case of forming a conductive pattern having a curved portion, the width of the conductive pattern in the curved portion is made appropriate by controlling the drawing speed and the paste discharge amount at the curved portion of the conductive pattern. be able to.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below based on embodiments with reference to the drawings.

FIG. 1 is a schematic perspective view of an embodiment of a direct drawing apparatus of the present invention.

An X-axis table 2 which is movable in the X-axis direction with respect to the fixed base 1 is placed on the upper surface of the fixed base 1, and a pair of workpieces are placed on the X-axis table 2. The holding parts 3 and 4 are fixed, and the work 5 is held between the pair of work holding parts 3 and 4. In this embodiment, the work 5 is a cylindrical base material having a thick film circuit formed on its surface. Here, as the work 5, a cylindrical work with both shafts in which shafts 5a and 5b are provided at both ends in the axial direction of the cylinder is used.

In FIG. 1, the one work holding portion 3 located on the right side is different from the collet chuck 6 for holding the end portion of one shaft 5a of the work 5 from the outside, and the difference in the axial length of the work 5. A chucking shaft 8 having a collet spacer 7 for absorbing is provided. The chucking shaft 8 is rotatably supported by a chucking block 9 fixed to the X-axis table 2. The chucking shaft 8 is connected to the motor 11 via a coupling 10. As the motor 11, for example, a pulse-driven harmonic geared motor is used.

The other work holding portion 4 located on the left side in FIG. 1 includes a center holder 12 for pressing the shaft center of the end of the other shaft 5b of the work 5 and a shaft to which the center holder 12 is attached. It is provided with a center holder block 13 which is rotatably supported. The work holding unit 4 is movable in the X axis direction on the X axis table 2 by a sliding mechanism (not shown). However, during operation of the direct drawing apparatus, the work holding unit 4 is fixed to a position corresponding to the axial length of the work 5 by a stopper mechanism (not shown).

A drawing head supporting device 14 is fixed to the fixed base portion 1, and the drawing head supporting device 14 is fixed.
An elevating member 15 is provided to be movable in the vertical direction (Z-axis direction), and a drawing head 16 is directly provided on the elevating member 15. The direct drawing head 16 is provided with a cylindrical body 16a for accommodating the conductive paste and a paste ejection port 16b for ejecting the conductive paste onto the surface of the work 5, and compresses the cylindrical body 16a. By applying compressed air from an air source (not shown) through the air pipe 16c, the conductive paste is discharged from the paste discharge port 16b.

FIG. 2 shows the position of the X-axis table 2 (position in the X-axis direction), the rotational position of the chucking shaft 8 (position in the θ-axis direction), and the position of the drawing head 16 with respect to the workpiece (Z).
FIG. 3 is a block diagram showing a control system for controlling the axial position) and the paste ejection amount in the drawing head 16.

The X-axis table 2 shown in FIG. 1 is provided with an X-axis drive device 41 (not shown in FIG. 1) for moving the X-axis table 2 in the X-axis direction with respect to the fixed base 1. ing. The X-axis driving device 41 has a pulse motor (not shown) built therein, and moves the X-axis table 2 in the X-axis direction by a distance corresponding to the number of applied pulses. The motor 11 is included in the θ-axis drive device 42 that controls the rotational position of the chucking shaft 8. In addition, the drawing head 16
Is attached to an elevating member 15 provided so as to be movable in the direction perpendicular to the axis of the work 5, and the drawing head 1
The position of 6 is controlled by the Z-axis drive device 43. Furthermore,
A paste ejection control device 44 for controlling the amount of paste ejected from the drawing head 16 is provided.

The X-axis driving device 41 and the θ-axis driving device 4
2. Z-axis drive device 43 and paste discharge control device 44
Are connected to the control device 45 and are controlled by known numerical control techniques. Further, the control device 45 has an input device 46 for inputting various drawing conditions, and a display device 4 for confirming data input from the input device 46 and for directly displaying an operating state of the drawing device.
7. A storage device 48 for storing the drawing conditions input from the input device 46 and the conductive pattern to be drawn on the work 5 is connected. The conductive pattern to be drawn is generated by the CAD device 49 and stored in the storage device 48.

3 (a), 3 (b) and 3 (c) are a front view, a side view and an enlarged sectional view of an essential part showing an example of the roll 51 manufactured by the direct drawing apparatus of the present invention. The roll 51 corresponds to the work 5 in FIGS. 1 and 2.

Reference numeral 51a in the figure denotes a cylindrical base material made of a resin having sufficient heat resistance to a heat treatment for hardening the conductive paste, for example, a phenol resin containing an inorganic material. For example, the diameter is 25 mm and the length is 400 mm. A thick film layer 51b is formed by forming a thick layer of conductive paste on the surface of the cylindrical base material 51a. The thick film layer 51b is formed by forming 360 axially extending conductive stripes having a width of 100 μm in the circumferential direction and a thickness of 50 μm on the cylindrical substrate 51a at an angle of 1 ° on the circumference. It is configured. As the thick film material for forming the thick film layer, a conductive paste, a silver-based epoxy binder, or the like can be used. Every other one of the plurality of conductive stripes, one end side thereof is commonly connected. The other ends of the remaining conductive stripes are also commonly connected. FIG. 3D schematically shows a conductive pattern formed by the thick film layer 51b on the cylindrical base material 51a, developed on a plane. The terminal t1 is derived from one conductive stripe set, and the terminal t2 is derived from the other conductive stripe set.

The shafts 5a, 5 are provided at both ends of the cylindrical base member 51a.
b is provided, and conical recesses 52a and 52b are provided on the shaft cores at the ends of both shafts 5a and 5b.

The above-mentioned roll 51 is used as, for example, a developing roll of a developing device of a copying machine,
For example, by applying a potential difference between the terminals t1 and t2 to generate a potential difference in the circumferential direction of the roll 51, or by applying the same potential to the terminals t1 and t2, the above-mentioned JP-A-58 is used. It is used as a developing roll having a conductive split electrode as described in JP-A-60770.

Next, a method of manufacturing the roll 51 by the above-mentioned direct drawing apparatus will be described.

In this embodiment, the roll is basically manufactured according to the following five procedures.

(1) Return to origin (2) Input of drawing conditions (3) Work attachment (4) Conductive pattern drawing (5) Work removal Each procedure will be described below.

(1) Return to origin When an instruction to return to origin is given from the input device 46 shown in FIG. 2, the controller 45 causes the X-axis drive device 41 and the θ-axis drive device 42.
The Z-axis drive device 43 is controlled, and the positions of the X-axis table 2, the chucking shaft 8 and the drawing head 16 are set to the reference positions. Further, the paste discharge control device 44 is controlled so that the conductive paste is not discharged from the drawing head 16.

(2) Drawing condition input From the input device 46, the drawing speed, the work 5 and the drawing head 1
When the drawing conditions such as the distance from the paste ejection port 16a of No. 6 are input, these drawing conditions are stored in the storage device 48, for example.
Memorized in. The pattern to be drawn is generated by the CAD device 49 and stored in the storage device 48.

(3) Work Attachment The work 5 is mounted between the pair of work holding portions 3 and 4 of the direct drawing apparatus. In this embodiment, one shaft 5a of the work 5 is fixed by a chucking method and the other shaft 5b is fixed by a center holding method.

When mounting the work 5, the stopper (not shown) of the holding unit 4 of the center holding system is released to make it movable in the X-axis direction, and the holding unit 4 is moved leftward in FIG. Thereby, the center holder 1 of the holding portion 4
The distance between the tip of 2 and the collet chuck 6 of the holding portion 3 is widened, and the shafts 5b and 5a of the work 5 can be arranged between the center holder 12 and the collet chuck 6.

Next, one shaft 5a of the work 5 is inserted into the collet chuck 6 of the chucking work holding portion 3. At this time, the collet chuck 6 is assumed to be in a loosened state. In parallel with this, the other shaft 5b of the work 5 is positioned on the shafts of the work holding parts 3 and 4, and the holding part 4 of the center holding system is moved to the inside, that is, the work 5 side, and the tip of the center holder 12 is moved. Is brought into contact with the center of the other shaft 5b of the work 5. When the holding part 4 is further moved inward, a pressing force is applied from the tip of the center holder 12 to the end of the other shaft 5b of the work 5. When the center holder 12 reaches the movement limit, the stopper (not shown) is fixed and the position of the holding portion 4 is fixed. Further, the collet chuck 6 of the chucking type work holding part 3 is tightened to fix one end of the shaft 5a of the work 5. As a result, the ends of both shafts 5a and 5b of the work 5 are firmly fixed by the pair of work holding portions 3 and 4.

(4) When the drawing start is instructed from the drawing input device 46, the drawing condition and the drawing pattern inputted previously are read from the storage device 48, and the drawing is started based on these information.

First, the controller 45 controls the Z-axis drive unit 4
3 is controlled, the drawing head 16 moves to the work 5 side from the origin, and the distance between the paste discharge port 16a of the drawing head 16 and the work 5 is secured. Then, next, the control device 45
The X-axis drive device 41 and the paste ejection control device 44 are controlled by the control so that the X-axis table 2 starts moving in the + side X-axis direction and the drawing head 16 starts ejecting paste. As a result, the positive X on the work 5.
Drawing in the axial direction starts. That is, drawing of one thick film layer 51b shown in FIG. 3A is started. X
When drawing in the direction (formation of one thick film layer 51b) is completed,
The discharging of the paste is stopped, the θ-axis drive device 42 is controlled by the control device 45, the chucking shaft 8 rotates, and the chucking shaft 8 moves to a predetermined set angle point. For example, in this embodiment, it rotates by 1 °.

In this embodiment, when rotating in the θ-axis direction, a harmonic drive motor and a coupling with a very small backlash are used as the motor 11 in the present embodiment, so that the θ-axis can be accurately positioned, for example, the positioning accuracy ±. It can be controlled at 0.05 °.

Next, this time, the X-axis table 2 starts to move in the negative X-axis direction, the discharge of the paste is started from the drawing head 16, and the second thick film layer 51b is drawn. Thereafter, each thick film layer 51b is formed in the same manner. 36
When the formation of the zero thick film layers 51b is completed, the position of the X-axis table 2 is controlled so that the drawing head 16 is positioned at one end of each thick film layer 51b, and then the drawing head 16 When the chucking shaft 8 is rotated while the discharge of the paste is started, the thick film layer 51 in the circumferential direction is formed on the work 5.
b, a large number of thick film layers 51b formed in the axial direction
Are commonly connected to every other. After this work is performed on both ends of the work 5, the drawing head 16 returns to the origin and the work is completed.

As described above, the drawing condition and the drawing pattern are stored in the storage device 48 in advance, so that the drawing operation is automatically performed and a thick film circuit as shown in FIG. 3 is manufactured. You can

(5) Workpiece removal After the drawing is completed, the stopper (not shown) of the holding unit 4 is released, the center holder block 13 is moved in the direction away from the work 5, and the collet chuck of the holding unit 4 is loosened. Thus, the work can be removed from the pair of holding portions 3 and 4.

The processing in the direct drawing device is completed by the above steps (1) to (5).

Next, the paste is heat-treated in order to cure the epoxy contained in the paste, and after inspection, the roll manufacturing is completed.

When forming a conductive pattern on the surface of a cylindrical substrate, depending on the shape of the conductive pattern,
The conductive pattern may not be formed accurately. For example, two horizontal conductive patterns P1 and P2, which are different in position by 90 degrees in the circumferential direction, are connected by a conductive pattern P3 inclined at 45 degrees on the surface of a cylindrical base material 53a as shown in FIG. The case of manufacturing the roll 53 having the conductive pattern will be described as an example.

As described above, when the conductive pattern is formed on the cylindrical substrate, the work 5 shown in FIG. 1 is used.
Can be rotated in the θ-axis direction and moved in the X-axis direction to form a conductive pattern having an arbitrary shape. However, when the width of the conductive pattern becomes as thin as about 100 μm, even if there is no problem in the case of linear drawing, when the drawing direction is changed, the width of the conductive pattern is the standard at the curved portion of the conductive pattern. The width is narrower than the width of, and there is a risk of breaking the wire at this part.

Therefore, in this embodiment, the discharge amount of the paste from the drawing head 16 and the moving speed of the drawing head 16 on the X-axis and the θ-axis are controlled at the curved portion of the conductive pattern.
The direct drawing device is controlled so that a conductive pattern having a sufficient width is formed even in a curved portion of the conductive pattern.

FIG. 5 shows patterns P1, P2 shown in FIG.
It is explanatory drawing which shows the procedure which forms the bent conductive pattern which consists of P3. As described above, the drawing pattern itself is stored in the storage device 48 in advance, and the X-axis driving device 41, the θ-axis driving device 42, and the paste ejection control device 44 are controlled by the control device 45 according to the drawing pattern. Is controlled to form a conductive pattern having a predetermined shape. Note that here, the rotation angle of the θ axis is
It shall be given as a value with 0.5 degree as “1”.
The X-axis movement amount is given as a numerical value in mm.

FIG. 6A shows a conductive pattern at the start of drawing. At the start of drawing, the shape of the end of the conductive pattern can be controlled by changing the time from the start of discharging the paste to the start of movement of the work 5 (this is called drawing start time). it can. For example, this drawing start time is set to 2 to 20 ms. By discharging the conductive paste from the drawing head 16 while moving the X-axis table 2 in the X-axis direction, a conductive pattern P1 is formed in the X-axis direction as shown in FIG. For example, when using silver epoxy as the conductive paste,
The air pressure for discharging the paste at this time is 3800 to 5800.
g / cm ³ . Further, the drawing speed, that is, the relative speed of the drawing head 16 with respect to the surface of the work 5 is 10 to 10.
50 mm / s, and preferably 10 to 20 mm / s. When the X-axis table 2 moves in the X-axis direction by the designated distance, the movement of the X-axis table 2 is stopped and the paste discharge is stopped. As a result, a conductive pattern P1 of a horizontal portion having a predetermined length is formed as shown in FIG. The time from when the movement of the X-axis table 2 is stopped to when the discharge of the paste is stopped is called a drawing end time, and is 20 to 100 ms, preferably 20 in this embodiment.
-30 ms. Next, the X-axis table 2 is moved in the X-axis direction, and at the same time, the work 5 is rotated in the θ-axis direction to form a conductive pattern in the tilt direction as shown in FIGS. Be started. Now, when forming the inclined conductive pattern P3 extending in the direction of 45 degrees in the θ axis direction as shown in FIG. 4, the control value of the θ axis is “9.
It becomes "0". The inclined conductive pattern P3 is inclined 45 degrees with respect to the conductive pattern formed on the surface of the roll 53 along the axial direction. Now, assuming that the diameter of the roll 53 is 25 mm, the control value of the X axis is "19.6.
3 (= 25π / (360/90)) ”. The X-axis table 2 moves in the X-axis direction by the designated distance, and
When the work 5 is rotated by the designated angle, the movement of the X-axis table 2 and the rotation of the work 5 are stopped, and a conductive pattern of an inclined portion having a predetermined length is formed as shown in FIG.

Next, by moving only the X-axis table 2 by a predetermined distance, a conductive pattern of a horizontal portion as shown in FIGS. 9 (g), (h) and (i) is formed.

Here, in this embodiment, the drawing speed is controlled in the bent portion of the conductive pattern to prevent the bent portion of the conductive pattern from becoming thin. The connection portion between the horizontal conductive pattern P1 and the inclined conductive pattern P3, that is, the bent portion will be described as an example. In the bent portion, the drawing speed of the conductive pattern is gradually changed as shown in FIG. ing. That is, the drawing speed is constant in most of the conductive pattern P1, but when the drawing head approaches the bent portion (time T1), the drawing speed is gradually decreased. Then, once at time T2, the drawing speed is set to 0.
After that, the formation of the inclined conductive pattern P3 is started while gradually increasing the drawing speed, and when the drawing head is separated from the bent portion (time T3), the drawing speed is kept constant. As a result, the drawing speed becomes slower in the bent portion, and the supply amount of the conductive paste per unit drawing length increases, so that a sufficient amount of the conductive paste is supplied in the bent portion and the pattern becomes thin at the bent portion. It is possible to prevent the wire from breaking or breaking.

In the drawing device described above, the drawing speed in the X direction is uniquely determined by the number of pulses per unit time applied to the pulse motor provided in the X-axis drive device 41. Similarly, the angular velocity in the θ direction is determined by the number of pulses applied to the motor 11 per unit time. However, the drawing speed in the θ direction on the surface of the work is the same even if the number of pulses per unit time is the same.
It depends on the diameter of the work. Further, in the case of drawing in the oblique direction, the drawing speed changes depending on the inclination angle of the conductive pattern because it is a composite vector of the drawing speed in the X direction and the drawing speed in the θ direction.

Therefore, in the present embodiment, the control device 45
In the above, by controlling the number of pulses applied to the motor 11 per unit time by using the diameter of the work, the inclination angle of the conductive pattern, and the like as parameters, the bent portion is irrespective of the diameter of the work and the inclination angle of the conductive pattern. Other than that, the drawing speed is kept constant. That is, the larger the diameter of the workpiece, the smaller the number of pulses applied to the motor 11 per unit time so that the drawing speed becomes constant, and the smaller the inclination angle of the conductive pattern, the more pulses per unit time. The number of is reduced so that the drawing speed becomes constant. This allows
It is possible to always form a conductive pattern having a constant width.

As described above, in this embodiment, the basic drawing speed is kept constant regardless of the diameter of the work and the inclination angle of the conductive pattern, and further, in forming the conductive pattern having the curved portion. By properly selecting the amount of paste discharged, the rotation speed in the θ-axis direction, and the moving speed in the X-axis direction, the width of the conductive pattern in the curved portion can be made appropriate.

The quality of the roll produced by the above method was evaluated. As a result of confirming disconnection, contact between lines, position of line, and parallelism of line from the assumption of problems caused by the device, no problem occurred.

[0050]

As described above, in the present invention, since the cylindrical base material on which the conductive pattern is to be formed is used as the work and is directly drawn while being rotated in the circumferential direction, the cylindrical shape is obtained. An arbitrary conductive pattern can be easily formed as a thick film on the substrate. As a result, it is possible to easily perform the work of forming a large number of divided electrodes on the surface of the roll, which has been difficult in the past, and it is possible to reduce the manufacturing cost.

Further, by properly selecting the discharge amount of the paste, the rotation speed in the θ-axis direction, and the moving speed in the X-axis direction, the width of the conductive pattern in the bent portion can be made appropriate.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an embodiment of a direct drawing apparatus of the present invention.

FIG. 2 is a block diagram showing a control system of a direct drawing device.

FIG. 3 is a front view, a side view, and an enlarged sectional view of an essential part showing an example of a roll manufactured by the direct drawing apparatus of the present invention.

FIG. 4 is a perspective view showing another example of a roll manufactured by the direct drawing apparatus of the present invention.

FIG. 5 is an enlarged explanatory view showing a bent portion of a conductive pattern.

FIG. 6 is an explanatory diagram showing an example of forming a conductive pattern having a bent portion.

FIG. 7 is a graph showing a change in drawing speed in a curved portion.

FIG. 8 is a schematic perspective view showing a principle configuration of a conventional direct drawing apparatus.

[Explanation of symbols]

1 ... Fixed base part, 2 ... X-axis table, 3, 4 ... Work holding part, 5 ... Work, 5a, 5b ... Shaft, 6 ... Collet chuck, 7 ... Collet spacer, 8 ... Chucking shaft, 9 ...
Chucking block, 10 ... Coupling, 11 ... Motor, 12 ... Center holder, 13 ... Center holder block, 14 ... Drawing head supporting device, 15 ... Elevating member, 16 ... Direct drawing head, 16a ... Cylindrical body, 16b ...
Paste discharge port, 16c ... Air pipe, 41 ... X-axis drive device, 42 ... θ-axis drive device, 43 ... Z-axis drive device, 44
... paste ejection control device, 45 ... control device, 46 ... input device, 47 ... display device, 48 ... storage device, 49 ... CAD
Device, 51, 53 ... Roll, 51a, 53a ... Cylindrical base material, 51b, 53b ... Thick film layer, 52a, 52b ... Recessed portion

Claims (3)

[Claims] 1. In a direct drawing apparatus for forming a conductive pattern on a base material by directly discharging a conductive paste onto the base material, a work holding unit for holding a cylindrical base material as a work, and the work holding unit. A movable table that moves a portion along the axial direction of the work, a motor that rotates the work with the shaft of the work as a rotation axis, and a drawing head having a paste discharge port that discharges the conductive paste onto the work. A paste discharge amount control means for controlling a discharge amount of paste in the drawing head; a conductive pattern setting part for setting a conductive pattern to be formed on the work; a drawing condition setting part for setting a drawing condition; According to the conductive pattern set by the conductive pattern setting unit and the drawing condition set by the drawing condition setting unit, the motor Direct imaging apparatus characterized by rolling and a drawing control unit that controls the speed and the moving speed of the movable table the discharge amount of the paste from the drawing head. 2. The work held by the work holding section is a roll on which an electrode is to be formed, and the conductive pattern setting section sets an electrode pattern to be formed on the surface of the roll. The direct drawing device according to claim 1. 3. The drawing control unit sets at least one of the rotation speed of the motor, the moving speed of the movable table, and the discharge amount of the paste from the drawing head in the straight line portion of the conductive pattern in the vicinity of the curved portion of the conductive pattern. The direct drawing apparatus according to claim 1, wherein the direct drawing apparatus is controlled so as to be different from.