WO2016084202A1 - 半導体装置およびその製造方法 - Google Patents
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Abstract
Description
本実施の形態のヒューズ素子は、1つの半導体チップ内において回路のパターンの一部を構成するものであり、半導体装置の製造プロセスにおいて、回路特性の調整または不良となった回路の排除などを行う必要がある場合に、レーザー光によって切断されるものである。ただし、ヒューズ素子は半導体装置の製造工程において必ず切断されるものではない。例えば、当該ヒューズ素子が接続された回路が所望の特性で動作する場合には切断されない。
本実施の形態の半導体装置の製造方法を、図5~図13を参照して説明する。
以下では、ヒューズ素子の下に熱伝導性の高い膜を形成し、さらに、ヒューズ素子の直下の素子分離領域の上面に凹部を形成することにより、リーク電流の発生を防ぐことについて、図14~図20を用いて説明する。本実施の形態は、レーザートリミングを行ったヒューズ素子の切断部において、リーク電流が流れ得るリーク経路を延長することで、リーク電流の発生を防ぐものである。図14~図18は、本実施の形態の半導体装置の製造方法を説明する断面図である。図14~図18では、図5~図13と同様にヒューズ領域1Aおよびトランジスタ領域1Bを示している。図19は、本実施の形態の半導体装置を示す平面図である。図20は、レーザートリミングを行った場合における図19のC-C線における断面図である。
以下に、図21および図22を用いて、本実施の形態の半導体装置の変形例について説明する。図21および図22は、本実施の形態の半導体装置の変形例の断面図である。図21では、レーザートリミングを行っていないヒューズ素子FEを拡大して示し、図22では、レーザートリミングを行ったヒューズ素子FEを拡大して示す。図21および図22では、図を分かりやすくするため、層間絶縁膜IL2よりも上の膜などの図示を省略している。本変形例と図18~図20に示す構造との違いは、図21および図22に示すように、溝D1の側壁が庇状になっている点である。
1B トランジスタ領域
CP コンタクトプラグ
CV1、CV2 カバー絶縁膜
EP エピタキシャル基板
FE ヒューズ素子
IF3、IF4 絶縁膜
IL1、IL2 層間絶縁膜
M1、M2 配線
OP 開口部
PI パッシベーション膜
RL 素子分離領域
SB 半導体基板
TC 絶縁膜
TR バイポーラトランジスタ
Claims (15)
- 半導体基板と、
前記半導体基板上の第1絶縁膜と、
前記第1絶縁膜上に形成された第2絶縁膜と、
前記第2絶縁膜上に形成された、シリコンを含む導電膜と、
を有し、
前記導電膜は、ヒューズを構成し、
前記第2絶縁膜は、前記第1絶縁膜よりも熱伝導率が高い、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絶縁膜に対する前記第2絶縁膜の密着性は、前記第1絶縁膜に対するシリコン膜の密着性よりも低い、半導体装置。 - 請求項1記載の半導体装置において、
前記導電膜の直下の前記第1絶縁膜の上面には、溝が形成されており、
前記溝内には、前記第2絶縁膜の一部が埋め込まれている、半導体装置。 - 請求項3記載の半導体装置において、
前記溝の側壁は、前記半導体基板の主面に対して垂直に形成されている、半導体装置。 - 請求項3記載の半導体装置において、
前記溝の側壁は、庇状に形成されている、半導体装置。 - 請求項1記載の半導体装置において、
前記導電膜上には、第3絶縁膜が形成されており、
前記第2絶縁膜、前記導電膜および前記第3絶縁膜からなる積層膜は開口部を有し、
前記開口部により前記ヒューズは、切断されており、
前記開口部の底面において、前記第1絶縁膜の上面が露出している、半導体装置。 - 請求項6記載の半導体装置において、
前記開口部の前記底面において、前記第1絶縁膜の上面に形成された溝の側壁が露出している、半導体装置。 - 請求項6記載の半導体装置において、
前記開口部内の側壁において、前記第2絶縁膜は、前記導電膜よりも、平面視における前記開口部の中央に近い位置で終端している、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絶縁膜は、酸化シリコンを含み、
前記第2絶縁膜は、窒化シリコンまたは炭化シリコンを含む、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絶縁膜上に前記第2絶縁膜を介して形成された前記ヒューズを複数有し、
複数の前記ヒューズのうちの一部の前記ヒューズは、切断されている、半導体装置。 - (a)半導体基板を用意する工程、
(b)前記半導体基板上に第1絶縁膜を形成する工程、
(c)前記第1絶縁膜上に第2絶縁膜を形成する工程、
(d)前記第2絶縁膜上に、シリコンを含む導電膜を形成する工程、
を有し、
前記導電膜は、ヒューズを構成し、
前記第2絶縁膜は、前記第1絶縁膜よりも熱伝導率が高い、半導体装置の製造方法。 - 請求項11記載の半導体装置の製造方法において、
前記第1絶縁膜に対する前記第2絶縁膜の密着性は、前記第1絶縁膜に対するシリコン膜の密着性よりも低い、半導体装置の製造方法。 - 請求項11記載の半導体装置の製造方法において、
(b1)前記(c)工程の前に、前記第1絶縁膜の上面に溝を形成する工程をさらに有し、
前記(c)工程では、前記溝内に前記第2絶縁膜の一部を埋め込む、半導体装置の製造方法。 - 請求項13記載の半導体装置の製造方法において、
前記(b1)工程では、異方性エッチングにより前記溝を形成する、半導体装置の製造方法。 - 請求項11記載の半導体装置の製造方法において、
(e)前記導電膜上に第3絶縁膜を形成する工程、
(f)前記導電膜に対してレーザー照射を行うことで、前記第2絶縁膜、前記導電膜および前記第3絶縁膜からなる積層膜を貫通する開口部を形成し、これにより前記ヒューズを切断する工程、
をさらに有し、
前記開口部の底面において、前記第1絶縁膜の上面が露出している、半導体装置の製造方法。
Priority Applications (6)
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PCT/JP2014/081432 WO2016084202A1 (ja) | 2014-11-27 | 2014-11-27 | 半導体装置およびその製造方法 |
JP2015544668A JP6335184B2 (ja) | 2014-11-27 | 2014-11-27 | 半導体装置およびその製造方法 |
US14/894,178 US9917054B2 (en) | 2014-11-27 | 2014-11-27 | Semiconductor device including a fuse formed on a high thermal conductivity insulating film |
CN201480030385.4A CN105830209B (zh) | 2014-11-27 | 2014-11-27 | 半导体器件及其制造方法 |
TW104138665A TW201631704A (zh) | 2014-11-27 | 2015-11-23 | 半導體裝置及其製造方法 |
US15/855,510 US20180138122A1 (en) | 2014-11-27 | 2017-12-27 | Semiconductor device and manufacturing method of the same |
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US14/894,178 A-371-Of-International US9917054B2 (en) | 2014-11-27 | 2014-11-27 | Semiconductor device including a fuse formed on a high thermal conductivity insulating film |
US15/855,510 Division US20180138122A1 (en) | 2014-11-27 | 2017-12-27 | Semiconductor device and manufacturing method of the same |
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CN106783550A (zh) * | 2017-01-11 | 2017-05-31 | 清华大学 | 在衬底片分区上进行异质外延的方法 |
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DE102016115939B4 (de) * | 2016-08-26 | 2021-05-27 | Infineon Technologies Ag | Einmal programmierbare Speicherzelle und Speicheranordnung |
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Also Published As
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US20180138122A1 (en) | 2018-05-17 |
US9917054B2 (en) | 2018-03-13 |
TW201631704A (zh) | 2016-09-01 |
CN105830209B (zh) | 2020-12-22 |
US20170005036A1 (en) | 2017-01-05 |
JP6335184B2 (ja) | 2018-05-30 |
CN105830209A (zh) | 2016-08-03 |
JPWO2016084202A1 (ja) | 2017-08-31 |
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