JPS5438764A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPS5438764A
JPS5438764A JP10559677A JP10559677A JPS5438764A JP S5438764 A JPS5438764 A JP S5438764A JP 10559677 A JP10559677 A JP 10559677A JP 10559677 A JP10559677 A JP 10559677A JP S5438764 A JPS5438764 A JP S5438764A
Authority
JP
Japan
Prior art keywords
semiconductor device
numbers
roms
difference
field effect
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.)
Granted
Application number
JP10559677A
Other languages
Japanese (ja)
Other versions
JPS6122470B2 (en
Inventor
Kenji Tokuyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10559677A priority Critical patent/JPS5438764A/en
Publication of JPS5438764A publication Critical patent/JPS5438764A/en
Publication of JPS6122470B2 publication Critical patent/JPS6122470B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Semiconductor Memories (AREA)

Abstract

PURPOSE:To electrically readily recognize the numbers of the photoetching masks used and the code numbers of ROMs by making use of the difference in VT, etc. by the ion inplantation in a field effect semiconductor device.
JP10559677A 1977-09-01 1977-09-01 Semiconductor device Granted JPS5438764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10559677A JPS5438764A (en) 1977-09-01 1977-09-01 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10559677A JPS5438764A (en) 1977-09-01 1977-09-01 Semiconductor device

Publications (2)

Publication Number Publication Date
JPS5438764A true JPS5438764A (en) 1979-03-23
JPS6122470B2 JPS6122470B2 (en) 1986-05-31

Family

ID=14411871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10559677A Granted JPS5438764A (en) 1977-09-01 1977-09-01 Semiconductor device

Country Status (1)

Country Link
JP (1) JPS5438764A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5676565A (en) * 1979-11-28 1981-06-24 Nec Corp Integrated circuit
JPS5771568A (en) * 1980-10-22 1982-05-04 Fujitsu Ltd Marking method of bubble meory wafer
JPS59127859A (en) * 1983-01-12 1984-07-23 Sanyo Electric Co Ltd Manufacture of rom semiconductor device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5676565A (en) * 1979-11-28 1981-06-24 Nec Corp Integrated circuit
JPS6367341B2 (en) * 1979-11-28 1988-12-26 Nippon Electric Co
JPS5771568A (en) * 1980-10-22 1982-05-04 Fujitsu Ltd Marking method of bubble meory wafer
JPS59127859A (en) * 1983-01-12 1984-07-23 Sanyo Electric Co Ltd Manufacture of rom semiconductor device

Also Published As

Publication number Publication date
JPS6122470B2 (en) 1986-05-31

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