JPS52129385A - Productoon of bipolar integrated circuit device - Google Patents

Productoon of bipolar integrated circuit device

Info

Publication number
JPS52129385A
JPS52129385A JP4549776A JP4549776A JPS52129385A JP S52129385 A JPS52129385 A JP S52129385A JP 4549776 A JP4549776 A JP 4549776A JP 4549776 A JP4549776 A JP 4549776A JP S52129385 A JPS52129385 A JP S52129385A
Authority
JP
Japan
Prior art keywords
productoon
integrated circuit
circuit device
bipolar integrated
type
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
JP4549776A
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 JP4549776A priority Critical patent/JPS52129385A/en
Publication of JPS52129385A publication Critical patent/JPS52129385A/en
Pending legal-status Critical Current

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  • Element Separation (AREA)

Abstract

PURPOSE:To prevent parasitic isolation phenomena and increase isolation dielectric strength by providing a P<+> type layer of a high impurity concentration to the back of a P type Si substrate.
JP4549776A 1976-04-23 1976-04-23 Productoon of bipolar integrated circuit device Pending JPS52129385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4549776A JPS52129385A (en) 1976-04-23 1976-04-23 Productoon of bipolar integrated circuit device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4549776A JPS52129385A (en) 1976-04-23 1976-04-23 Productoon of bipolar integrated circuit device

Publications (1)

Publication Number Publication Date
JPS52129385A true JPS52129385A (en) 1977-10-29

Family

ID=12721026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4549776A Pending JPS52129385A (en) 1976-04-23 1976-04-23 Productoon of bipolar integrated circuit device

Country Status (1)

Country Link
JP (1) JPS52129385A (en)

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