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GB1469005A - Standard telephones cables ltd semiconductor device manufacture - Google Patents

Standard telephones cables ltd semiconductor device manufacture

Info

Publication number
GB1469005A
GB1469005A GB5157474A GB5157474A GB1469005A GB 1469005 A GB1469005 A GB 1469005A GB 5157474 A GB5157474 A GB 5157474A GB 5157474 A GB5157474 A GB 5157474A GB 1469005 A GB1469005 A GB 1469005A
Authority
GB
United Kingdom
Prior art keywords
cables
etching
standard telephones
etching solution
semiconductor device
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.)
Expired
Application number
GB5157474A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB5157474A priority Critical patent/GB1469005A/en
Priority to DE19752551444 priority patent/DE2551444A1/en
Priority to JP14168075A priority patent/JPS5622368B2/ja
Publication of GB1469005A publication Critical patent/GB1469005A/en
Expired legal-status Critical Current

Links

Classifications

    • H10P50/613—
    • H10P50/617—

Landscapes

  • Weting (AREA)

Abstract

1469005 Semi-conductor devices STANDARD TELEPHONES & CABLES Ltd 18 Nov 1975 [28 Nov 1974] 51574/74 Heading H1K [Also in Division C7] A semi-conductor device, e.g. a field effect transistor or a photocathode, is manufactured from a semiconductor body 1 e.g. of gallium arsenide by preferentially etching one or more of its relatively high resistivity portions 2, e.g. doped with Cr and O in an etching solution 3 whilst an electrical potential, e.g. of 10 volts is applied to the body to render only the relatively low resistivity portion(s) sufficiently negative with respect to the etching solution to inhibit etching of the former. The etching solution may be aqueous, e.g. containing H 2 SO 4 and H 2 O 2 , KOH and H 2 O 2 or H 2 SO 4 and (NH 4 ) 2 S 2 O 8 , or comprise Br 2 and methanol.
GB5157474A 1974-11-28 1974-11-28 Standard telephones cables ltd semiconductor device manufacture Expired GB1469005A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5157474A GB1469005A (en) 1974-11-28 1974-11-28 Standard telephones cables ltd semiconductor device manufacture
DE19752551444 DE2551444A1 (en) 1974-11-28 1975-11-15 METHOD FOR SHAPING A SEMICONDUCTOR BODY
JP14168075A JPS5622368B2 (en) 1974-11-28 1975-11-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5157474A GB1469005A (en) 1974-11-28 1974-11-28 Standard telephones cables ltd semiconductor device manufacture

Publications (1)

Publication Number Publication Date
GB1469005A true GB1469005A (en) 1977-03-30

Family

ID=10460546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5157474A Expired GB1469005A (en) 1974-11-28 1974-11-28 Standard telephones cables ltd semiconductor device manufacture

Country Status (3)

Country Link
JP (1) JPS5622368B2 (en)
DE (1) DE2551444A1 (en)
GB (1) GB1469005A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000190A (en) * 1977-06-14 1979-01-04 Sony Corp Methods of electrolytically etching ferrite bodies and magnetic transducer heads including bodies so etched
GB2165993A (en) * 1984-10-24 1986-04-23 Marconi Instruments Ltd Method of fabricating devices on semiconductor substrates

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309782B1 (en) * 1987-09-30 1994-06-01 Siemens Aktiengesellschaft Etching process for silicon (100)
US6401009B1 (en) 1999-02-16 2002-06-04 Suzette M. Chandonnet Sundry article vending apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000190A (en) * 1977-06-14 1979-01-04 Sony Corp Methods of electrolytically etching ferrite bodies and magnetic transducer heads including bodies so etched
GB2000190B (en) * 1977-06-14 1982-03-17 Sony Corp Methods of electrolytically etching ferrite bodies and magnetic transducer heads including bodies so etched
GB2165993A (en) * 1984-10-24 1986-04-23 Marconi Instruments Ltd Method of fabricating devices on semiconductor substrates

Also Published As

Publication number Publication date
JPS5177074A (en) 1976-07-03
DE2551444A1 (en) 1976-08-12
JPS5622368B2 (en) 1981-05-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee