JPS5214377A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPS5214377A
JPS5214377A JP9030275A JP9030275A JPS5214377A JP S5214377 A JPS5214377 A JP S5214377A JP 9030275 A JP9030275 A JP 9030275A JP 9030275 A JP9030275 A JP 9030275A JP S5214377 A JPS5214377 A JP S5214377A
Authority
JP
Japan
Prior art keywords
semiconductor device
layers
collector
double
improve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9030275A
Other languages
Japanese (ja)
Inventor
Heiji Moroshima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9030275A priority Critical patent/JPS5214377A/en
Publication of JPS5214377A publication Critical patent/JPS5214377A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: Double expitaxial layers with varied impurity concentrations are formed between collector and base layers to improve the second breakdown voltage.
COPYRIGHT: (C)1977,JPO&Japio
JP9030275A 1975-07-25 1975-07-25 Semiconductor device Pending JPS5214377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9030275A JPS5214377A (en) 1975-07-25 1975-07-25 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9030275A JPS5214377A (en) 1975-07-25 1975-07-25 Semiconductor device

Publications (1)

Publication Number Publication Date
JPS5214377A true JPS5214377A (en) 1977-02-03

Family

ID=13994730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9030275A Pending JPS5214377A (en) 1975-07-25 1975-07-25 Semiconductor device

Country Status (1)

Country Link
JP (1) JPS5214377A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518073A (en) * 1978-07-26 1980-02-07 Fujitsu Ltd Manufacture of variable-capacity diode
US5237183A (en) * 1989-12-14 1993-08-17 Motorola, Inc. High reverse voltage IGT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518073A (en) * 1978-07-26 1980-02-07 Fujitsu Ltd Manufacture of variable-capacity diode
US5237183A (en) * 1989-12-14 1993-08-17 Motorola, Inc. High reverse voltage IGT

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