JP6956234B2 - ポリマー基板を有する半導体素子を備えるプリント回路モジュール、及びその製造方法 - Google Patents
ポリマー基板を有する半導体素子を備えるプリント回路モジュール、及びその製造方法 Download PDFInfo
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- JP6956234B2 JP6956234B2 JP2020119130A JP2020119130A JP6956234B2 JP 6956234 B2 JP6956234 B2 JP 6956234B2 JP 2020119130 A JP2020119130 A JP 2020119130A JP 2020119130 A JP2020119130 A JP 2020119130A JP 6956234 B2 JP6956234 B2 JP 6956234B2
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- H01L2924/1517—Multilayer substrate
- H01L2924/15172—Fan-out arrangement of the internal vias
- H01L2924/15174—Fan-out arrangement of the internal vias in different layers of the multilayer substrate
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L2924/181—Encapsulation
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Description
本開示は、半導体素子及びその製造方法に関する。
[背景]
高周波相補性金属酸化膜半導体(RFCMOS)シリコン・オン・インシュレータ(SOI)RFパワースイッチは、現在市場に出回っているほぼ全ての携帯電話機において必要不可欠な装置である。この装置の製造に用いられる既存のRFCMOS SOI技術は、ますます複雑化する多投RFスイッチ、同調型RF静電容量アレイ、及びアンテナRFチューナにおいて、優れた性能を提供する。従来のRFCMOS SOI装置は、抵抗率の範囲が1000 Ohm−cmから5000 Ohm−cmである、高抵抗CMOS基板上に構成される。複数の比較的低電圧の電界効果トランジスタ(FETs)が、該複数の低電圧FET間で所望の絶縁を維持しながら積層され得るように、RFCMOS SOI技術を採用したパワースイッチには高抵抗基板が用いられる。
プリント回路モジュール、及びその製造方法を開示する。プリント回路モジュールはプリント回路基板を備え、プリント回路基板には薄肉ダイが取り付けられる。薄肉ダイは、プリント回路基板の上に少なくとも1つの素子層と、該少なくとも1つの素子層の上に埋め込み酸化(BOX)層とを備える。BOX層の上にはポリマー層が備えられ、該ポリマーの熱伝導率は2ワット毎メートルケルビン(W/mK)よりも高く、電気抵抗率は103Ohm−cmよりも高い。
さらなる局面とを理解するであろう。
本明細書及び特許請求の範囲に援用され、その一部を構成する添付の図面は、本開示の種々の局面を説明するものであり、本明細書と共に、本開示の原理を説明する役割を果たす。
以下に記載する実施形態は、当業者が本開示を実施できるようにするために必要な情報を説明するものであり、本開示を実施する最良の態様を例示するものである。当業者は、添付の図面に照らして以下の説明を読むことで本開示の概念を理解し、本明細書で特に述べられていない本開示の概念の応用を認識するであろう。本開示の概念及びその応用は、本開示及び添付の請求項の範囲に含まれるものと理解されるべきである。
directly in)」ある、又は「上へ直接(directly onto)」延在している、と記載されている場合には、介在する要素は存在しない。また、ある要素が別の要素に「接続される(connected)」、又は「連結される(coupled)」、と記載されている場合、この要素が別の要素と直接接続されても、又は直接連結されてもよく、或いは、介在する要素が存在してもよいと理解されるであろう。これに対して、ある要素が別の要素と「直接接続される(directly connected)」、又は別の要素と「直接連結される(directly coupled)」、と記載されている場合には、介在する要素は存在しない。
ンジスタが、実用的に、理想的に積層される。この結果として得られる半導体素子は、シリコンハンドルウェハ装置において従来可能である場合よりも、比較的はるかに高いRF電力レベル及び実効電圧で使用可能である。
X層14及び半導体積層構造10の残りの部分に加えて、ソースフリップチップバンプ26及びドレインフリップチップバンプ32にも損傷を与えることなく遂行されることが望ましい。
プチップバンプ32とを一時的担持体マウント36に対向させて、一時的担持体マウント36に実装される。(手順102)。続く工程では、半導体積層構造10の第1の面38を露出させるために、シリコンウェハハンドル12を除去する(手順104)。続いて、ポリマー基板40は、種々のポリマー材料取り付け方法を用いて、半導体積層構造10の第1の面38に取り付けられる(手順106)。このような、ポリマー基板40を半導体積層構造10の第1の面38に取り付ける方法には、ポリマー材料の射出成形、スピン堆積、スプレー堆積、及びパターンディスペンシングを、半導体積層構造10の第1の面38の上に直接行うことが含まれるが、この限りではない。ひとたびポリマー基板40が半導体積層構造10の第1の面38に取り付けられると、一時的担持体マウント36は取り外される(手順108)。
ンウェハハンドル12の基板抵抗率である1k Ohm−cmよりも大幅に高い基板抵抗率を効果的に提供する。
す底部保護層74は、通常は、例えばポリアミドのような、プリント回路基板58の底部面全体に渡って重ねられる誘電性材料である。底部保護層74は、少なくともモジュールバンプ66を覆うのに十分な厚さがある。
を用いてボードパネル56から個片化される。例えば、レーザー鋸切断、レーザースクライビング、又はダイヤモンドスクライビング等の、個片化の別の方法もまた代替案として用いられてもよい。通常、底部保護層74は、底部保護層を紫外線(UV)にさらすことによって除去される。プリント回路モジュール82が回路基板(図示せず)に接続されて最終製品となり得るように、底部保護層74の除去によって、モジュールバンプ66を露出させる。
Claims (15)
- プリント回路モジュールの製造方法であって、
プリント回路基板の表側に取り付けられたダイを備えるプリント回路基板を提供することであって、前記ダイは、前記プリント回路モジュールの上に少なくとも1つの素子層と、前記少なくとも1つの素子層の上に埋め込み酸化(BOX)層と、前記BOX層の上にハンドル層と、を備える、プリント回路基板を提供することと、
第1の保護層を、前記ダイに直接接触するように、前記ハンドル層と前記BOX層との間の界面とほぼ平行な平面まで、前記プリント回路基板に重ねることと、
第2の保護層を、前記プリント回路基板の底部側に重ねることと、
前記BOX層を露出させた薄肉ダイを提供するために、前記ダイから前記ハンドル層を除去することと、
前記BOX層にポリマー層を重ねることであって、前記ポリマー層の熱伝導率は2ワット毎メートルケルビン(W/mK)よりも高く、電気抵抗率は103Ohm−cmよりも高い、前記BOX層にポリマー層を重ねることと、
を備える、プリント回路モジュールの製造方法。 - 前記ハンドル層の除去は化学的エッチングによって遂行される、請求項1に記載のプリント回路モジュールの製造方法。
- 前記化学的エッチングは、エチレンジアミン(EDA)と、ピロカテコール(C6H4(OH)2)と、水との組み合わせを用いて実施される、請求項2に記載のプリント回路モジュールの製造方法。
- 前記ハンドル層の除去は、機械的エッチングと化学的エッチングを組み合わせて遂行される、請求項1に記載のプリント回路モジュールの製造方法。
- 前記プリント回路モジュールの剛性を高めるために、プラスチック外層を前記ポリマー層に重ねることをさらに備える、請求項1に記載のプリント回路モジュールの製造方法。
- 前記プラスチック外層はエポキシ樹脂の硬化物である、請求項5に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層と前記BOX層との間の粘着性を高めるために、前記ポリマー層を重ねる前に、接着層を前記BOX層に重ねることをさらに備える、請求項1に記載のプリント回路モジュールの製造方法。
- 前記接着層は窒化ケイ素によって構成される、請求項7に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の厚さは100μmから500μmの範囲である、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ダイは高周波集積回路(RFIC)である、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の前記熱伝導率は、10W/mKから50W/mKの範囲である、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の前記熱伝導率は、50W/mKから6600W/mKの範囲である、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の熱抵抗率は0.1mK/Wである、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の前記電気抵抗率は、1012Ohm−cmから1016Ohm−cmの範囲である、請求項1に記載のプリント回路モジュールの製造方法。
- 前記ポリマー層の前記電気抵抗率は、103Ohm−cmから1012Ohm−cmの範囲である、請求項1に記載のプリント回路モジュールの製造方法。
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