JPS5385177A - Base diffusion type semiconductor device and its production - Google Patents

Base diffusion type semiconductor device and its production

Info

Publication number
JPS5385177A
JPS5385177A JP4577A JP4577A JPS5385177A JP S5385177 A JPS5385177 A JP S5385177A JP 4577 A JP4577 A JP 4577A JP 4577 A JP4577 A JP 4577A JP S5385177 A JPS5385177 A JP S5385177A
Authority
JP
Japan
Prior art keywords
production
semiconductor device
type semiconductor
diffusion type
base diffusion
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
JP4577A
Other languages
Japanese (ja)
Inventor
Tsunao Tsukikawa
Kenji Yoshinaga
Hideaki Kato
Hiroyuki Matsumoto
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 JP4577A priority Critical patent/JPS5385177A/en
Publication of JPS5385177A publication Critical patent/JPS5385177A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bipolar Transistors (AREA)

Abstract

PURPOSE: To prevent the current concentration on the surface of a diffused base region and lower production cost by forming an annular form current cut-off groove of a suitable depth encircling the outside of an emitter region in part of the surface of the diffused base region.
COPYRIGHT: (C)1978,JPO&Japio
JP4577A 1977-01-05 1977-01-05 Base diffusion type semiconductor device and its production Pending JPS5385177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4577A JPS5385177A (en) 1977-01-05 1977-01-05 Base diffusion type semiconductor device and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4577A JPS5385177A (en) 1977-01-05 1977-01-05 Base diffusion type semiconductor device and its production

Publications (1)

Publication Number Publication Date
JPS5385177A true JPS5385177A (en) 1978-07-27

Family

ID=11463303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4577A Pending JPS5385177A (en) 1977-01-05 1977-01-05 Base diffusion type semiconductor device and its production

Country Status (1)

Country Link
JP (1) JPS5385177A (en)

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