JP7147501B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP7147501B2 JP7147501B2 JP2018216561A JP2018216561A JP7147501B2 JP 7147501 B2 JP7147501 B2 JP 7147501B2 JP 2018216561 A JP2018216561 A JP 2018216561A JP 2018216561 A JP2018216561 A JP 2018216561A JP 7147501 B2 JP7147501 B2 JP 7147501B2
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- 239000004065 semiconductor Substances 0.000 title claims description 143
- 238000004519 manufacturing process Methods 0.000 title claims description 81
- 229920005989 resin Polymers 0.000 claims description 149
- 239000011347 resin Substances 0.000 claims description 149
- 238000005520 cutting process Methods 0.000 claims description 129
- 238000007789 sealing Methods 0.000 claims description 83
- 238000007747 plating Methods 0.000 claims description 40
- 238000005530 etching Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 description 57
- 239000000463 material Substances 0.000 description 13
- 230000004048 modification Effects 0.000 description 13
- 238000012986 modification Methods 0.000 description 13
- 230000001681 protective effect Effects 0.000 description 13
- 239000003822 epoxy resin Substances 0.000 description 7
- 229920000647 polyepoxide Polymers 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000011179 visual inspection Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- WABPQHHGFIMREM-AKLPVKDBSA-N lead-210 Chemical compound [210Pb] WABPQHHGFIMREM-AKLPVKDBSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Description
図1~図6に基づき、本開示の第1実施形態にかかる半導体装置A1について説明する。半導体装置A1は、複数のリード1~3、半導体素子6、ボンディングワイヤ71,72、および封止樹脂8を備える。
図17~図18に基づき、本開示の第1実施形態にかかる半導体装置A1の製造方法の第1変形例について説明する。図17および図18は、半導体装置A1の製造方法にかかる工程を示す断面図である。図17は図8に相当する図であり、図18は図11に相当する図である。
図19~図20に基づき、本開示の第1実施形態にかかる半導体装置A1の製造方法の第2変形例について説明する。図19および図20は、半導体装置A1の製造方法にかかる工程を示す断面図である。図19は図8に相当する図であり、図20は図11に相当する図である。
図21~図25に基づき、本開示の第2実施形態にかかる半導体装置A2について説明する。各図において、先述した半導体装置A1と同一または類似の要素には同一の符号を付して、重複する説明を省略する。図21は、半導体装置A2を示す斜視図である。図22は、半導体装置A2を示す斜視図であって、底面側を上側にした状態の図である。図23は、半導体装置A2を示す底面図である。図24は、半導体装置A2の製造方法にかかる工程を示す平面図である。図25は、半導体装置A2の製造方法にかかる工程を示す底面図である。
厚さ方向において互いに反対側を向く主面および裏面を有するリードフレームを準備する準備工程と、
前記主面に半導体素子を搭載する搭載工程と、
前記半導体素子を覆う封止樹脂を形成する樹脂形成工程と、
前記リードフレームの前記裏面から、前記リードフレームの前記厚さ方向の途中まで切削を行うことで溝部を形成する溝部形成工程と、
前記溝部に沿って、前記厚さ方向視において前記溝部よりも幅が狭く且つそのすべてが前記溝部に重なる除去領域において前記リードフレームおよび前記封止樹脂を前記厚さ方向の全域において除去する切断工程と、
を備え、
前記準備工程では、前記リードフレームの、前記除去領域に、前記厚さ方向の端部が開口している穴部を形成し、
前記溝部形成工程では、前記裏面側に前記穴部が露出した状態とし、
前記切断工程では、前記穴部を基準にして切断を行う、
ことを特徴とする半導体装置の製造方法。
〔付記2〕
前記穴部は、前記主面側の端部が開口している、
付記1に記載の半導体装置の製造方法。
〔付記3〕
前記溝部形成工程では、前記溝部の前記裏面と同じ方向を向く底面が前記穴部につながるまで、切削を行う、
付記2に記載の半導体装置の製造方法。
〔付記4〕
前記穴部は、前記主面側の端部および前記裏面側の端部が開口している、
付記1に記載の半導体装置の製造方法。
〔付記5〕
前記封止樹脂は、前記穴部の内部に形成された充填部を有する、
付記2ないし4のいずれかに記載の半導体装置の製造方法。
〔付記6〕
前記穴部は、前記裏面側の端部が開口している、
付記1に記載の半導体装置の製造方法。
〔付記7〕
前記溝部の前記厚さ方向の寸法は、前記穴部の前記厚さ方向の寸法より小さい、
付記6に記載の半導体装置の製造方法。
〔付記8〕
前記準備工程では、エッチングにより前記穴部を形成する、
付記1ないし7のいずれかに記載の半導体装置の製造方法。
〔付記9〕
前記溝部形成工程では、第1ブレードでのハーフカットダイシングにより前記溝部を形成し、
前記切断工程では、前記第1ブレードより薄い第2ブレードでのフルカットダイシングにより除去を行う、
付記1ないし8のいずれかに記載の半導体装置の製造方法。
〔付記10〕
前記溝部形成工程では、前記厚さ方向に直交する第1方向に沿って延びる第1溝部と、前記第1溝部に直交する第2溝部とを形成する、
付記1ないし9のいずれかに記載の半導体装置の製造方法。
〔付記11〕
前記切断工程は、前記第1溝部に沿う第1除去領域において除去を行う第1切断工程と、前記第2溝部に沿う第2除去領域において除去を行う第2切断工程とを備える、
付記10に記載の半導体装置の製造方法。
〔付記12〕
前記穴部は、少なくとも、前記第1除去領域と前記第2除去領域との交差領域以外にも形成されている、
付記11に記載の半導体装置の製造方法。
〔付記13〕
前記溝部形成工程の後に、前記リードフレームにおいて、少なくとも、前記溝部が形成された部分を覆うめっき層を形成するめっき工程を、さらに備えている、
付記1ないし12のいずれかに記載の半導体装置の製造方法。
1 :第1リード
110 :ワイヤボンディング部
111 :ワイヤボンディング部主面
112 :ワイヤボンディング部裏面
120 :第1端子部
121 :第1端子部主面
122 :第1端子部裏面
123 :第1端子部端面
124 :第1端子部凹部
130 :第2端子部
131 :第2端子部主面
132 :第2端子部裏面
133 :第2端子部端面
134 :第2端子部凹部
140 :めっき層
2 :第2リード
210 :ワイヤボンディング部
211 :ワイヤボンディング部主面
212 :ワイヤボンディング部裏面
220 :第1端子部
221 :第1端子部主面
222 :第1端子部裏面
223 :第1端子部端面
224 :第1端子部凹部
230 :第2端子部
231 :第2端子部主面
232 :第2端子部裏面
233 :第2端子部端面
234 :第2端子部凹部
240 :めっき層
3 :第3リード
310 :搭載部
311 :搭載部主面
312 :搭載部裏面
320 :第1端子部
321 :第1端子部主面
322 :第1端子部裏面
323 :第1端子部端面
324 :第1端子部凹部
330 :第2端子部
331 :第2端子部主面
332 :第2端子部裏面
333 :第2端子部端面
334 :第2端子部凹部
340 :めっき層
6 :半導体素子
60 :素子本体
61 :第1電極
62 :第2電極
63 :第3電極
71,72:ボンディングワイヤ
8 :封止樹脂
81 :樹脂主面
82 :樹脂裏面
83 :樹脂第1側面
84 :樹脂第2側面
85,86:樹脂凹部
900 :リードフレーム
901 :主面
902 :裏面
903 :穴部
904 :溝部
904a :底面
904b :側面
905 :溝部
905a :底面
905b :側面
910 :めっき層
920 :封止樹脂
921 :充填部
921a :端面
951 :第1ブレード
952 :第2ブレード
970 :保護テープ
S1 :第1除去領域
S2 :第2除去領域
S3 :溝部形成領域
S4 :第2溝部形成領域
Claims (13)
- 厚さ方向において互いに反対側を向く主面および裏面を有するリードフレームを準備する準備工程と、
前記主面に半導体素子を搭載する搭載工程と、
前記半導体素子を覆う封止樹脂を形成する樹脂形成工程と、
前記リードフレームの前記裏面から、前記リードフレームの前記厚さ方向の途中まで切削を行うことで溝部を形成する溝部形成工程と、
前記溝部に沿って、前記厚さ方向視において前記溝部よりも幅が狭く且つそのすべてが前記溝部に重なる除去領域において前記リードフレームおよび前記封止樹脂を前記厚さ方向の全域において除去する切断工程と、
を備え、
前記準備工程では、前記リードフレームの、前記除去領域に、前記厚さ方向の端部が開口している穴部を形成し、
前記溝部形成工程では、前記裏面側に前記穴部が露出した状態とし、
前記切断工程では、前記穴部を基準にして切断を行う、
ことを特徴とする半導体装置の製造方法。 - 前記穴部は、前記主面側の端部が開口している、
請求項1に記載の半導体装置の製造方法。 - 前記溝部形成工程では、前記溝部の前記裏面と同じ方向を向く底面が前記穴部につながるまで、切削を行う、
請求項2に記載の半導体装置の製造方法。 - 前記穴部は、前記主面側の端部および前記裏面側の端部が開口している、
請求項1に記載の半導体装置の製造方法。 - 前記封止樹脂は、前記穴部の内部に形成された充填部を有する、
請求項2ないし4のいずれかに記載の半導体装置の製造方法。 - 前記穴部は、前記裏面側の端部が開口している、
請求項1に記載の半導体装置の製造方法。 - 前記溝部の前記厚さ方向の寸法は、前記穴部の前記厚さ方向の寸法より小さい、
請求項6に記載の半導体装置の製造方法。 - 前記準備工程では、エッチングにより前記穴部を形成する、
請求項1ないし7のいずれかに記載の半導体装置の製造方法。 - 前記溝部形成工程では、第1ブレードでのハーフカットダイシングにより前記溝部を形成し、
前記切断工程では、前記第1ブレードより薄い第2ブレードでのフルカットダイシングにより除去を行う、
請求項1ないし8のいずれかに記載の半導体装置の製造方法。 - 前記溝部形成工程では、前記厚さ方向に直交する第1方向に沿って延びる第1溝部と、前記第1溝部に直交する第2溝部とを形成する、
請求項1ないし9のいずれかに記載の半導体装置の製造方法。 - 前記切断工程は、前記第1溝部に沿う第1除去領域において除去を行う第1切断工程と、前記第2溝部に沿う第2除去領域において除去を行う第2切断工程とを備える、
請求項10に記載の半導体装置の製造方法。 - 前記穴部は、少なくとも、前記第1除去領域と前記第2除去領域との交差領域以外にも形成されている、
請求項11に記載の半導体装置の製造方法。 - 前記溝部形成工程の後に、前記リードフレームにおいて、少なくとも、前記溝部が形成された部分を覆うめっき層を形成するめっき工程を、さらに備えている、
請求項1ないし12のいずれかに記載の半導体装置の製造方法。
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