JP4273356B2 - 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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- 239000004065 semiconductor Substances 0.000 title claims description 102
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 239000011347 resin Substances 0.000 claims description 157
- 229920005989 resin Polymers 0.000 claims description 157
- 239000000758 substrate Substances 0.000 claims description 49
- 239000002243 precursor Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002161 passivation Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002577 polybenzoxazole Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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Description
集積回路が形成され、前記集積回路に電気的に接続された電極を有する半導体基板と、
前記半導体基板の前記電極が形成された面の、前記集積回路とオーバーラップする第1の領域に形成された第1の樹脂層と、
前記電極に電気的に接続されて前記第1の樹脂層上に形成された配線と、
前記半導体基板の前記面の、前記第1の領域を囲む第2の領域に、前記第1の樹脂層とは間隔をあけて形成された第2の樹脂層と、
を有する。本発明によれば、集積回路とオーバーラップする領域を外側で囲むように第2の樹脂層が形成してあるので、第2の樹脂層によって、クラックが発生することを集積回路の外側で防止することができる。
(2)この半導体装置において、
前記第2の樹脂層は、前記第1の樹脂層よりも低く形成されていてもよい。
(3)この半導体装置において、
前記第2の樹脂層は、前記第2の領域全体に連続的に配置されていてもよい。
(4)この半導体装置において、
前記第2の樹脂層は、断片的に配置されていてもよい。
(5)この半導体装置において、
前記第2の樹脂層は、前記半導体基板の周縁に接するように配置されていてもよい。
(6)この半導体装置において、
前記半導体基板の前記周縁は矩形をなし、少なくとも角部に前記第2の樹脂層が配置されていてもよい。
(7)この半導体装置において、
前記配線は、前記電極から前記第1の樹脂層を超えて第2の樹脂層上に至るように形成されていてもよい。
(8)本発明に係る半導体装置の製造方法は、
複数の集積回路が間隔をあけて形成されてそれぞれの前記集積回路に電気的に接続された電極が形成された半導体基板を用意する工程と、
前記複数の集積回路とそれぞれオーバーラップする複数の第1の領域に第1の樹脂層を形成し、それぞれの前記第1の領域を外側で囲む第2の領域に前記第1の樹脂層とは間隔をあけて第2の樹脂層を形成する工程と、
前記第1の樹脂層上に、前記電極と電気的に接続する配線を形成する工程と、
前記半導体基板を、隣り合う前記第1の領域の間で、前記第2の樹脂層の少なくとも一部が前記第2の領域に付着して残るように、複数の半導体チップに切断する工程と、
を含む。本発明によれば、集積回路とオーバーラップする領域を外側で囲むように第2の樹脂層を形成するので、第2の樹脂層によって、クラックが発生することを集積回路の外側で防止することができる。
(9)この半導体装置の製造方法において、
前記第2の樹脂層を、前記半導体基板の、前記半導体基板を切断する工程で切断する切削領域を避けて形成してもよい。
(10)この半導体装置の製造方法において、
前記半導体基板を切断する工程は、前記第2の樹脂の一部を切削しながら行ってもよい。
(11)この半導体装置の製造方法において、
前記第1の樹脂層を形成する工程は、熱硬化性の第1の樹脂前駆体層を形成して前記第1の樹脂前駆体層を加熱することを含み、
前記第2の樹脂層を形成する工程は、熱硬化性の第2の樹脂前駆体層を形成して前記第2の樹脂前駆体層を加熱することを含み、
前記第1及び第2の樹脂前駆体層を、同じ高さであって、前記第2の樹脂前駆体層の単位体積当りの表面積が前記第1の樹脂前駆体よりも大きくなるように同時に形成し、
前記第1及び第2の樹脂前駆体層を同時に加熱し、単位体積当りの表面積が大きいことによって前記第2の樹脂前駆体層の単位体積当りの熱量を大きくして、前記第2の樹脂前駆体層の硬化前の一時的な軟化の程度を高めて自重によって低くして、前記第2の樹脂層の高さを前記第1の樹脂層よりも低くしてもよい。
(12)この半導体装置の製造方法において、
前記配線を形成する工程で、1つの前記第1の樹脂層上に、相互に間隔をあけて複数の前記配線を形成し、
前記第1の樹脂層の、前記複数の配線間の部分をエッチングする工程をさらに含み、
前記エッチングする工程で、同時に、前記第2の樹脂層をエッチングして低くしてもよい。
図1(A)は、本発明の第1の実施の形態に係る半導体装置を示す平面図であり、図1(B)は、図1(A)に示す半導体装置のIB-IB線断面図である。半導体装置は、半導体基板10を有する。半導体基板10は、図1(A)に示す最終製品としての半導体装置においては半導体チップであるが、最終製品を得る前の段階では、半導体ウエハである。半導体ウエハを切断して半導体チップが得られる。半導体基板10には、集積回路12(半導体チップには1つの集積回路12/半導体ウエハには複数の集積回路12)が形成されている。半導体基板10は、内部配線(図示せず)を介して集積回路12に電気的に接続された電極14を有する。半導体基板10が一方向に長い形状(平面形状が長方形)であって、長い方の辺に沿って、複数の電極14が配列されている。半導体基板10には、電極14の少なくとも一部が露出する様にパッシベーション膜16が形成されている。パッシベーション膜16は、例えば、SiO2やSiN等の無機材料のみで形成されていてもよい。パッシベーション膜16は、集積回路12の上方に形成されている。
図3(A)〜図4(C)は、本発明の第1の実施の形態に係る半導体装置の製造方法を説明する図である。本実施の形態では、複数の集積回路12が間隔をあけて形成されてそれぞれの集積回路12に電気的に接続された電極14が形成された半導体基板10(半導体ウエハ)を用意する。その詳細は、上述した通りである。
図5は、本発明の第2の実施の形態に係る半導体装置を示す平面図である。本実施の形態では、半導体基板110の角部のみに第2の樹脂層132が配置されている点で第1の実施の形態と異なる。すなわち、4つの第2の樹脂層132のそれぞれが、矩形の半導体基板110の4つの角部のそれぞれに配置されている。半導体基板110の一辺の両端に位置する一対の第2の樹脂層132の間には、第2の樹脂層が形成されていない。この形態であっても、角部において半導体基板110を保護してクラックの発生を防止することができる。
図6(A)は、本発明の第3の実施の形態に係る半導体装置を示す平面図であり、図6(B)は、図6(A)に示す半導体装置のVIB-VIB線断面図である。本実施の形態では、第2の樹脂層232は、第2の領域222に連続的に(途切れないように)配置されている。したがって、第2の樹脂層232はロ字状をなしている。また、配線240が、電極114から第1の樹脂層130を超えて第2の樹脂層232上に至るように形成されている。これによれば、配線240の、第2の樹脂層232上の部分をテストパッドとして使用し、プローブを当てて特性検査を行うことができる。
Claims (3)
- 複数の集積回路が間隔をあけて形成されてそれぞれの前記集積回路に電気的に接続された電極が形成された半導体基板を用意する工程と、
前記複数の集積回路とそれぞれオーバーラップする複数の第1の領域に第1の樹脂層を形成し、それぞれの前記第1の領域を外側で囲む第2の領域に前記第1の樹脂層とは間隔をあけて第2の樹脂層を形成する工程と、
前記第1の樹脂層上に、前記電極と電気的に接続する配線を形成する工程と、
前記半導体基板を、隣り合う前記第1の領域の間で、前記第2の樹脂層の少なくとも一部が前記第2の領域に付着して残るように、複数の半導体チップに切断する工程と、
を含み、
前記第1の樹脂層を形成する工程は、熱硬化性の第1の樹脂前駆体層を形成して前記第1の樹脂前駆体層を加熱することを含み、
前記第2の樹脂層を形成する工程は、熱硬化性の第2の樹脂前駆体層を形成して前記第2の樹脂前駆体層を加熱することを含み、
前記第1及び第2の樹脂前駆体層を、同じ高さであって、前記第2の樹脂前駆体層の単位体積当りの表面積が前記第1の樹脂前駆体よりも大きくなるように同時に形成し、
前記第1及び第2の樹脂前駆体層を同時に加熱し、単位体積当りの表面積が大きいことによって前記第2の樹脂前駆体層の単位体積当りの熱量を大きくして、前記第2の樹脂前駆体層の硬化前の一時的な軟化の程度を高めて自重によって低くして、前記第2の樹脂層の高さを前記第1の樹脂層よりも低くする半導体装置の製造方法。 - 請求項1に記載された半導体装置の製造方法において、
前記第2の樹脂層を、前記半導体基板の、前記半導体基板を切断する工程で切断する切削領域を避けて形成する半導体装置の製造方法。 - 請求項1に記載された半導体装置の製造方法において、
前記半導体基板を切断する工程は、前記第2の樹脂層の一部を切削しながら行う半導体装置の製造方法。
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