JP2019009158A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2019009158A JP2019009158A JP2017120798A JP2017120798A JP2019009158A JP 2019009158 A JP2019009158 A JP 2019009158A JP 2017120798 A JP2017120798 A JP 2017120798A JP 2017120798 A JP2017120798 A JP 2017120798A JP 2019009158 A JP2019009158 A JP 2019009158A
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Abstract
Description
図1左右はコイルのQ値をコンピュータによりシミュレーションするためのモデルの一例を示す半導体基板の要部断面図である。図1左右のいずれも半導体基板100上には多層配線層101が形成されており、その多層配線層101の上部にはコイル102の導体パターン102aが形成されている。図1左ではコイル102の直下に配線103が配置されていないのに対して、図1右ではコイル102の直下に配線103が配置されている。図1右の配線103は、集積回路用の配線を意図したもので、平面視でコイル102の全域を覆うように形成されている(いわゆる、ベタ配線)。なお、半導体基板100は、シリコン(Si)単結晶を想定している。
<回路の構成例>
図7は本実施の形態1の半導体装置を用いた電子装置の一例の回路図である。
図8は、信号の伝送例を説明する説明図である。
次に、本実施の形態1の半導体装置(パッケージPKG)について図9〜図11を参照して説明する。図9は本実施の形態1の半導体装置の断面図、図10は図9の半導体装置内のチップの平面図、図11は図4の場合と本実施の形態1の場合とで比較して示したチップの平面図である。なお、図9では図面を見易くするため、封止体MBのハッチングを省略した。また、図10および図11では、1個のチップに2個のチップCP1,CP2の符号を付した。
次に、チップCP1,CP2の構成例について図12〜図14を参照して説明する。図12は半導体装置を構成する2個のチップの概略断面図、図13はコイルの一例の平面図、図14は図13のI−I線の断面図である。なお、図12では図面を見易くするため多層配線層WL1,WL2の絶縁層のハッチングを省略した。また、図12では、図7の一方の一対のコイルCL1,CL2を示している。
次に、コイル領域CLR1,CLR2(コイルCL1,CL2)に平面視で重ねて配置される回路について図9、図10、図15および図16を参照して説明する。
次に、本実施の形態の半導体装置の製造方法の一例を図17〜図20を参照して説明する。図17〜図20は半導体装置を構成するチップの製造工程中の要部断面図である。なお、チップCP1,CP2の製造方法は同じなので、チップCP1の製造方法を一例として説明する。また、この段階の半導体基板SB1は、平面視で略円形状の半導体ウエハである。
次に、前記実施の形態1の変形例1のチップCP1,CP2の構成例について図21を参照して説明する。図21は変形例1の半導体装置を構成する2個のチップの概略断面図である。なお、図21では、図12と同様に、封止体MB、リードLDおよびワイヤBWを省略しているが、これらの構成は前記実施の形態1の図9と同じである。
次に、実施の形態1の変形例2のチップCP1,CP2の構成例について図22を参照して説明する。図22は変形例2の半導体装置を構成する2個のチップの概略断面図である。図22では、図12と同様に、封止体MB、リードLDおよびワイヤBWを省略しているが、これらの構成は前記実施の形態1の図9と同じである。
図25は本実施の形態2の半導体装置を用いた電子装置の他の例の回路図である。
絶縁膜LFは、例えば、ポリイミド(polyimide)膜からなる。ポリイミド膜は、繰り返し単位にイミド結合を含む高分子であり、有機絶縁膜の一種である。絶縁膜LFとしては、ポリイミド膜の他に、エポキシ系、PBO系、アクリル系、WRP系の樹脂等、他の有機絶縁膜を用いることもできる。ポリイミド系樹脂は、200℃以上の高耐熱が求められるデバイスに好適に使用される有機樹脂であるが、材料の熱膨張係数や延性等の機械的強度、キュア温度等に応じて使い分けることができる。
PKG パッケージ
CP1,CP2 半導体チップ
CC 制御回路
TX1 送信回路
RX2 受信回路
IS1,IS2 アイソレータ
CL1,CL1a,CL1b,CL2,CL2a,CL2b コイル
CLP1,CLP2 導体パターン
ISF,ISF1,ISF2 絶縁フィルム
DP1,DP2 ダイパッド
LD,LD1,LD2 リード
BW ボンディングワイヤ
MB 封止体
SB1,SB2 半導体基板
PD1,PD2,PD3 ボンディングパッド
CAR,CBR 回路領域
CAR1,CBR1 領域
Tp pチャネル型の電界効果トランジスタ
Tn nチャネル型の電界効果トランジスタ
WL1,WL2 多層配線層
W 配線
Wp プラグ
Wv ビア部
RWL 再配線層
RW 再配線
IF 絶縁膜
PF1,PF2,PF3 表面保護膜
SD1,SD2 シールドパターン
PA1,PA2 配線禁止領域
Claims (16)
- 第1半導体チップと、
前記第1半導体チップに対向して配置された第2半導体チップと、
前記第1半導体チップと前記第2半導体チップとの対向間に介在された第1絶縁膜と、
前記第1半導体チップ、前記第2半導体チップおよび前記第1絶縁膜を封止する封止体と、
を備え、
前記第1半導体チップは、
第1面と、前記第1面の反対側の第2面とを有する第1半導体基板と、
前記第1半導体基板の前記第1面と前記第1絶縁膜との間に設けられた第1多層配線層と、
前記第1多層配線層に設けられた第1コイルと、
を備え、
前記第2半導体チップは、
前記第1半導体チップの前記第1面に対向する第3面と、前記第3面の反対側の第4面とを有する第2半導体基板と、
前記第2半導体基板の前記第3面と前記第1絶縁膜との間に設けられた第2多層配線層と、
前記第1絶縁膜を介して前記第1コイルに対向した状態で前記第2多層配線層に設けられ、前記第1コイルと磁気結合される第2コイルと、
を備え、
前記第1コイルは、前記第1半導体基板の前記第1面内に配置された第1回路領域の一部と平面視で重なるように配置され、
前記第2コイルは、前記第2半導体基板の前記第3面内に配置された第2回路領域の一部と平面視で重なるように配置されている、半導体装置。 - 請求項1記載の半導体装置において、
前記第1コイルおよび前記第2コイルの動作時の動作周波数が、200MHz以下である、半導体装置。 - 請求項1記載の半導体装置において、
前記第1多層配線層には、前記第1コイルの1つ下位の配線層に、前記第1コイルと平面視で重なるように第1シールドパターンが配置され、
前記第2多層配線層には、前記第2コイルの1つ下位の配線層に、前記第2コイルと平面視で重なるように第2シールドパターンが配置されている、半導体装置。 - 請求項3記載の半導体装置において、
前記第1シールドパターンおよび前記第2シールドパターンは、基準電位と電気的に接続されている、半導体装置。 - 請求項3記載の半導体装置において、
前記第1シールドパターンおよび前記第2シールドパターンの平面視の大きさは、前記第1コイルおよび前記第2コイルの直径より大きい、半導体装置。 - 請求項1記載の半導体装置において、
前記第1多層配線層には、前記第1コイルの1つ下位の配線層に、前記第1コイルと平面視で重なるように第1配線禁止領域が配置され、
前記第2多層配線層には、前記第2コイルの1つ下位の配線層に、前記第2コイルと平面視で重なるように第2配線禁止領域が配置されている、半導体装置。 - 請求項6記載の半導体装置において、
前記第1配線禁止領域および前記第2配線禁止領域の平面視の大きさは、前記第1コイルおよび前記第2コイルの直径より大きい、半導体装置。 - 請求項1記載の半導体装置において、
前記第1回路領域および前記第2回路領域の各々の前記一部には、デジタル回路が配置されている、半導体装置。 - 第5面およびその反対側の第6面を有する半導体基板と、
前記半導体基板の前記第5面上に設けられた多層配線層と、
前記多層配線層に設けられた第3コイルと、
前記第3コイルに対向した状態で前記多層配線層に設けられ、前記第3コイルと磁気結合される第4コイルと、
前記第3コイルと前記第4コイルとの間に介在された第2絶縁膜と、
を備え、
前記第3コイルは、前記第4コイルより下位の配線層に設けられ、
前記第3コイルおよび前記第4コイルは、前記半導体基板の前記第5面内に配置された回路領域の一部と平面視で重なるように配置されている、半導体装置。 - 請求項9記載の半導体装置において、
前記第3コイルおよび前記第4コイルの動作時の動作周波数が、200MHz以下である、半導体装置。 - 請求項9記載の半導体装置において、
前記多層配線層には、前記第3コイルの1つ下位の配線層に、前記第3コイルと平面視で重なるようにシールドパターンが配置されている、半導体装置。 - 請求項11記載の半導体装置において、
前記シールドパターンは、基準電位と電気的に接続されている、半導体装置。 - 請求項11記載の半導体装置において、
前記シールドパターンの平面視の大きさは、前記第3コイルおよび前記第4コイルの直径より大きい、半導体装置。 - 請求項9記載の半導体装置において、
前記多層配線層には、前記第3コイルの1つ下位の配線層に、前記第3コイルと平面視で重なるように配線禁止領域が配置されている、半導体装置。 - 請求項14記載の半導体装置において、
前記配線禁止領域の平面視の大きさは、前記第3コイルおよび前記第4コイルの直径より大きい、半導体装置。 - 請求項9記載の半導体装置において、
前記回路領域の前記一部には、デジタル回路が配置されている、半導体装置。
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