JPS5382139A - Protection method for frasable read only memory - Google Patents

Protection method for frasable read only memory

Info

Publication number
JPS5382139A
JPS5382139A JP15868776A JP15868776A JPS5382139A JP S5382139 A JPS5382139 A JP S5382139A JP 15868776 A JP15868776 A JP 15868776A JP 15868776 A JP15868776 A JP 15868776A JP S5382139 A JPS5382139 A JP S5382139A
Authority
JP
Japan
Prior art keywords
memory
frasable
read
protection method
protect
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
JP15868776A
Other languages
Japanese (ja)
Inventor
Masao Matsuda
Yasuo Nakayashiki
Shigeyoshi Igarashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15868776A priority Critical patent/JPS5382139A/en
Publication of JPS5382139A publication Critical patent/JPS5382139A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/10—Programming or data input circuits
    • G11C16/18—Circuits for erasing optically

Landscapes

  • Read Only Memory (AREA)
  • Non-Volatile Memory (AREA)

Abstract

PURPOSE:To protect the memory content, by covering the transparent surface of memory with the protective film free from removal and by preventing the transmission of ultraviolet ray.
JP15868776A 1976-12-27 1976-12-27 Protection method for frasable read only memory Pending JPS5382139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15868776A JPS5382139A (en) 1976-12-27 1976-12-27 Protection method for frasable read only memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15868776A JPS5382139A (en) 1976-12-27 1976-12-27 Protection method for frasable read only memory

Publications (1)

Publication Number Publication Date
JPS5382139A true JPS5382139A (en) 1978-07-20

Family

ID=15677151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15868776A Pending JPS5382139A (en) 1976-12-27 1976-12-27 Protection method for frasable read only memory

Country Status (1)

Country Link
JP (1) JPS5382139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172352A (en) * 1985-01-26 1986-08-04 Kyocera Corp Semiconductor package

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172352A (en) * 1985-01-26 1986-08-04 Kyocera Corp Semiconductor package

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