JPS548480A - Manufacture for semiconductor device - Google Patents

Manufacture for semiconductor device

Info

Publication number
JPS548480A
JPS548480A JP7320877A JP7320877A JPS548480A JP S548480 A JPS548480 A JP S548480A JP 7320877 A JP7320877 A JP 7320877A JP 7320877 A JP7320877 A JP 7320877A JP S548480 A JPS548480 A JP S548480A
Authority
JP
Japan
Prior art keywords
manufacture
semiconductor device
impurity
mask
substrate
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
JP7320877A
Other languages
Japanese (ja)
Inventor
Kaoru Niino
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 JP7320877A priority Critical patent/JPS548480A/en
Publication of JPS548480A publication Critical patent/JPS548480A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bipolar Transistors (AREA)
  • Bipolar Integrated Circuits (AREA)

Abstract

PURPOSE: To form two NPN transistors of high dielectric strength and small signal on one substrate, by forming three epitaxial layers and by using one of these as a mask to prevent the automatic doping of impurity.
COPYRIGHT: (C)1979,JPO&Japio
JP7320877A 1977-06-22 1977-06-22 Manufacture for semiconductor device Pending JPS548480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7320877A JPS548480A (en) 1977-06-22 1977-06-22 Manufacture for semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7320877A JPS548480A (en) 1977-06-22 1977-06-22 Manufacture for semiconductor device

Publications (1)

Publication Number Publication Date
JPS548480A true JPS548480A (en) 1979-01-22

Family

ID=13511493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7320877A Pending JPS548480A (en) 1977-06-22 1977-06-22 Manufacture for semiconductor device

Country Status (1)

Country Link
JP (1) JPS548480A (en)

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