JP5661052B2 - パワー半導体モジュールおよびその製造方法 - Google Patents
パワー半導体モジュールおよびその製造方法 Download PDFInfo
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- JP5661052B2 JP5661052B2 JP2012008083A JP2012008083A JP5661052B2 JP 5661052 B2 JP5661052 B2 JP 5661052B2 JP 2012008083 A JP2012008083 A JP 2012008083A JP 2012008083 A JP2012008083 A JP 2012008083A JP 5661052 B2 JP5661052 B2 JP 5661052B2
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Description
図1〜図5に、実施の形態1に係るパワー半導体モジュール100の構造図を示す。具体的には、図1はパワー半導体モジュール100の平面図(上面図)である。図2は図1中の矢印2の方向からパワー半導体モジュール100を見た場合の側面図であり、図3は図1中の矢印3の方向からパワー半導体モジュール100を見た場合の側面図である。図4は図2および図3中の4−4線の位置において矢印の方向からパワー半導体モジュール100を見た場合の平面図である。図5は図2および図3中の5−5線の位置において矢印の方向からパワー半導体モジュール100を見た場合の平面図である。なお、図2〜図5では、説明のために、後述のモールド樹脂(符号410参照。参考のためにその外形を二点鎖線で示す)を取り除いた状態を図示している。また、図6にパワー半導体モジュール100の回路図を示す。
図9〜図12に、実施の形態2に係るパワー半導体モジュール100Bの構造図を示す。具体的には、図9はパワー半導体モジュール100Bの平面図(上面図)である。図10は図9中の矢印10の方向からパワー半導体モジュール100Bを見た場合の側面図である。図11は図10中の11−11線の位置において矢印の方向からパワー半導体モジュール100Bを見た場合の平面図である。図12は図10中の12−12線の位置において矢印の方向からパワー半導体モジュール100Bを見た場合の平面図である。なお、図10〜図12では、説明のために、モールド樹脂410(参考のためにその外形を二点鎖線で示す)を取り除いた状態を図示している。また、図13にパワー半導体モジュール100Bの回路図を示す。
図16〜図19に、実施の形態3に係るパワー半導体モジュール100Cの構造図を示す。具体的には、図16はパワー半導体モジュール100Cの平面図(上面図)である。図17は図16中の矢印17の方向からパワー半導体モジュール100Cを見た場合の側面図である。図18は図17中の18−18線の位置において矢印の方向からパワー半導体モジュール100Cを見た場合の平面図である。図19は図17中の19−19線の位置において矢印の方向からパワー半導体モジュール100Cを見た場合の平面図である。なお、図17〜図19では、説明のために、モールド樹脂410(参考のためにその外形を二点鎖線で示す)を取り除いた状態を図示している。また、図20にパワー半導体モジュール100Cの回路図を示す。
図22〜図24に、実施の形態4に係るパワー半導体モジュール100Dの構造図を示す。具体的には、図22はパワー半導体モジュール100Dの平面図(上面図)である。図23は図22中の矢印23の方向からパワー半導体モジュール100Dを見た場合の側面図である。図24は図23中の24−24線の位置において矢印の方向からパワー半導体モジュール100Dを見た場合の平面図である。なお、上記の図4は、図23中の4−4線の位置において矢印の方向からパワー半導体モジュール100Dを見た場合の平面図としても利用される。
図25に、実施の形態5に係るパワー半導体モジュール100Eの側面図を示す。図25は図23に対応する。なお、上記の図4および図24は、図25中の4−4線および24−24線の位置において矢印の方向からパワー半導体モジュール100Eを見た場合の平面図としても利用される。
図26に、実施の形態6に係るパワー半導体モジュール100Fの側面図を示す。図26は図23に対応する。なお、上記の図4および図24は、図26中の4−4線および24−24線の位置において矢印の方向からパワー半導体モジュール100Fを見た場合の平面図としても利用される。
図27に、実施の形態7に係るパワー半導体モジュール100Gの側面図を示す。図27は図23に対応する。なお、上記の図4および図24は、図27中の4−4線および24−24線の位置において矢印の方向からパワー半導体モジュール100Gを見た場合の平面図としても利用される。
上記の実施の形態1等では、第3電極(副電極)290を有する構造を例示した。これに対し、第3電極290を必要としない半導体チップ(例えばダイオードチップ)のみを含んだパワー半導体モジュールでは、第3電極290は設けられない。
Claims (11)
- 樹脂封止型のパワー半導体モジュールであって、
それぞれが第1チップ主面および第2チップ主面を有する複数の半導体チップと、前記複数の半導体チップの前記第1チップ主面が第1接合部材によって接合された導電性を有するヒートスプレッダと、を含む単位構造体を複数備えると共に、
前記ヒートスプレッダから見て前記複数の半導体チップとは反対側に位置する絶縁部材と、
それぞれが第2接合部材によって所定箇所に接合された複数の主電極を含む複数の電極と
を備え、
前記複数の主電極は、
それぞれが前記複数の半導体チップのうちの所定のチップの前記第2チップ主面に前記第2接合部材によって接合された複数の第1電極と、
前記ヒートスプレッダのチップ搭載面に前記第2接合部材によって接合された第2電極と
を含み、
当該パワー半導体モジュールは、
前記複数の第1電極から見て前記複数の半導体チップとは反対側に位置する絶縁層と、前記絶縁層と前記複数の第1電極との間に位置し前記複数の第1電極に第3接合部材によって接合された第1導電層とを含む、絶縁基板と、
前記絶縁部材のうちで前記複数の半導体チップから遠い側の面と、前記絶縁基板のうちで前記複数の半導体チップから遠い側の面と、前記複数の電極の外部端子部分とが露出する状態で、前記複数の単位構造体と前記複数の電極を封止しているモールド樹脂と
を備え、
前記複数の電極は、当該複数の電極が予め形成されたリードフレームによって供給され、
前記複数の第1電極は、一の単位構造体において前記第2チップ主面に接合されていると共に他の単位構造体において前記ヒートスプレッダのチップ搭載面に接合されている直列接続型の第1電極を含み、
前記直列接続型の第1電極は、前記リードフレームから切り出された単一部材で構成されている、
パワー半導体モジュール。 - 前記複数の第1電極は前記絶縁基板の前記第1導電層に接合される面を同一平面上に有している、請求項1に記載のパワー半導体モジュール。
- 前記絶縁基板の前記第1導電層は複数の部分に分割されている、請求項1または請求項2に記載のパワー半導体モジュール。
- 前記第1導電層の前記複数の部分の個数は前記複数の第1電極の個数以上である、請求項3に記載のパワー半導体モジュール。
- 前記ヒートスプレッダから見て前記絶縁基板の側へ突出しているが前記絶縁基板に到達しない位置にループ頂点部を有する少なくとも1つのワイヤを更に備え、前記絶縁基板は前記少なくとも1つのワイヤの上方にも延在している、請求項1ないし請求項4のうちのいずれか1項に記載のパワー半導体モジュール。
- 前記絶縁基板は前記絶縁層から見て前記第1導電層とは反対側に第2導電層を更に含み、前記第1導電層は前記第2導電層よりも厚い、請求項1ないし請求項5のうちのいずれか1項に記載のパワー半導体モジュール。
- 前記複数の第1電極は、前記複数の半導体チップと接合する部分が前記複数の半導体チップと接合していない部分よりも厚い厚さ分布を有している、請求項1ないし請求項6のうちのいずれか1項に記載のパワー半導体モジュール。
- 前記第3接合部材は前記第1接合部材および前記第2接合部材よりも融点が低い、請求項1ないし請求項7のうちのいずれか1項に記載のパワー半導体モジュール。
- 前記複数の半導体チップは炭化珪素(SiC)を材料とする、請求項1ないし請求項8のうちのいずれか1項に記載のパワー半導体モジュール。
- 前記複数の第1電極は、前記モールド樹脂から外部へ突出して前記外部端子部分を有する突出型の第1電極を含み、
前記突出型の第1電極の前記外部端子部分と、前記第2電極の前記外部端子部分とは、前記絶縁部材の露出表面に平行な同一平面上に位置している、
請求項1ないし請求項9のうちのいずれか1項に記載のパワー半導体モジュール。 - 請求項1ないし請求項10のうちのいずれか1項に記載のパワー半導体モジュールを製造する方法であって、
(a)前記ヒートスプレッダ上に前記複数の半導体チップを前記第1接合部材によって接合する工程と、
(b)前記リードフレームに予め形成されている前記複数の電極のうちで前記第1電極を含む所定の電極群を、所定箇所に前記第2接合部材によって、同時に接合する工程と、
(c)前記モールド樹脂の形成後に前記リードフレームから前記パワー半導体モジュールを切り離す工程と
を備えるパワー半導体モジュールの製造方法。
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