JPS62252153A - Package for ultraviolet ray erasable read-only memory ic - Google Patents

Package for ultraviolet ray erasable read-only memory ic

Info

Publication number
JPS62252153A
JPS62252153A JP61095538A JP9553886A JPS62252153A JP S62252153 A JPS62252153 A JP S62252153A JP 61095538 A JP61095538 A JP 61095538A JP 9553886 A JP9553886 A JP 9553886A JP S62252153 A JPS62252153 A JP S62252153A
Authority
JP
Japan
Prior art keywords
package
liquid crystal
voltage
crystal film
ultraviolet ray
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
JP61095538A
Other languages
Japanese (ja)
Inventor
Masahiko Kumagai
雅彦 熊谷
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP61095538A priority Critical patent/JPS62252153A/en
Publication of JPS62252153A publication Critical patent/JPS62252153A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/10Programming or data input circuits
    • G11C16/18Circuits for erasing optically

Landscapes

  • Semiconductor Memories (AREA)

Abstract

PURPOSE:To eliminate a labor of separating and bonding a light screening seal whenever information is erased by covering a transmission window with a liquid crystal film, applying a voltage to the film to transmit an ultraviolet ray or the like. CONSTITUTION:A liquid crystal film 7 is coated to cover the rear side of a transmission window 5, a driving electrode 8 from the longitudinal end to the end face of a package 2 is led, and a terminal 9 is attached to the end of the electrode 8. In order to erase information of EPROM 1, a voltage is applied to the film 7 to be transparent in an X direction, and an ultraviolet ray is then emitted. Then, this ultraviolet ray or the like is arrived at the EPROM 1 to erase the writing information. When the voltage is eliminated after erasing, the film 7 becomes transparent in Y direction and opaque in the X direction.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、紫外線消去可能リードオンリメモリIC(
以下rEPROMJという)を収納するパッケージに関
し、特に、紫外線等の透過を遮断する手段に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides an ultraviolet erasable read-only memory IC (
The present invention relates to a package for accommodating an rEPROMJ (hereinafter referred to as rEPROMJ), and particularly relates to means for blocking the transmission of ultraviolet rays and the like.

〔従来の技術〕[Conventional technology]

従来のEFROM ’i収納するパッケージについて第
2図(a) 、 (b) t−参照して説明する。ここ
で、パッケージに収納するKFROMとは、電気的に書
き込まれ文情報が紫外線、X線などによって消去するこ
とのできるメモリICをいい、清報を消去した後には再
度断交な情報の書き込み全行ない繰り返し使用すること
ができるものである。
A conventional package for storing an EFROM will be described with reference to FIGS. 2(a) and 2(b). Here, the KFROM stored in the package refers to a memory IC that is written electrically and whose text information can be erased by ultraviolet rays, X-rays, etc., and after erasing the information, it is not necessary to write the information again. It can be used repeatedly.

同図からも明らかなように、EPROM (1)げ複数
の部材から構成され几パッケージ(2)に形成された内
部空間に収納されている。そしてこのlPROM (1
) Hワイヤ(8)ヲ介してパッケージ(2)外に引き
出されたリード(4)に電気的に接続されている。tf
cパッケージ(1)の上面にはEFROM (1)に書
き込まれた情報を消去する際、紫外線等が透過する透過
窓(6)が形成されており、この透過窓(6)には図示
しないガラスが嵌め込まれ、さらにパッケージ(1)表
面側から紫外線等の透過を遮断する遮光シール(6)が
被覆されている。
As is clear from the figure, the EPROM (1) is composed of a plurality of members and is housed in an internal space formed in a package (2). And this lPROM (1
) It is electrically connected to the lead (4) drawn out from the package (2) via the H wire (8). tf
A transparent window (6) is formed on the top surface of the c-package (1) through which ultraviolet rays, etc. can pass through when erasing the information written in the EFROM (1). The package (1) is further covered with a light-shielding seal (6) that blocks the transmission of ultraviolet rays from the surface side.

し友がってEFROM (1)に書き込まれた情報を消
去するときには、遮光シール(6)全パッケージ(1)
から剥がして、紫外線等を透過窓(5)から透過させて
EPROM (1)の書き込み情報全消去する。
When erasing the information written in the EFROM (1), remove the light-shielding sticker (6) from the entire package (1).
The EPROM (1) is then peeled off, and all written information in the EPROM (1) is erased by transmitting ultraviolet light or the like through the transmission window (5).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

ところが従来のパッケージであれば、  EFROM 
(1)の書き込み情報を消去するには、その都度遮光シ
ール(6)を剥がし、その後貼り付ける必要があっ友。
However, if it is a conventional package, EFROM
To erase the written information in (1), it is necessary to peel off the light shielding sticker (6) each time and then paste it back on.

このようなことを繰り返していると透過窓(5)のガラ
スを傷付け、あるいは接着剤、ごみなどがガラスに付着
して紫外線の透過を阻害し、書き込み情報を確実に消去
することができず、新たな書込みに障害をも几らすこと
にもなりかねないという問題点があった。
If this happens repeatedly, the glass of the transparent window (5) may be damaged, or adhesives, dust, etc. may adhere to the glass, obstructing the transmission of ultraviolet rays, and making it impossible to securely erase written information. There was a problem in that it could also create obstacles to new writing.

この発明はアシ上の問題点を解決するためになされたも
ので、情報を消去するたび遮光シールを剥がし、貼り付
は手間を要しないパッケージを提案するものである。
This invention was made in order to solve the problem of reeds, and proposes a package in which the light-shielding sticker is peeled off each time information is erased, and does not require the effort of pasting.

C問題点を解決する九めの手段〕 この発明に係るパッケージは、紫外線等の透過する透過
窓に液晶膜を被覆して、この液晶膜に電圧を印加するこ
とによってこれを透明にして紫外線等が透過するように
し友ものである。
Ninth Means for Solving Problem C] In the package according to the present invention, a transparent window that transmits ultraviolet rays, etc. is coated with a liquid crystal film, and by applying a voltage to the liquid crystal film, it becomes transparent and transmits ultraviolet rays, etc. It is a friend that should be transparent.

〔作用〕[Effect]

この発明によれば、EPROMにおける書き込み情報を
消去する際には、透過窓に取付けられた液晶膜に電圧を
印加することによって透明にした後、紫外線等を透過さ
せる。そして通常時にハ電圧をかけずに液晶膜を不透明
にして紫外線等の透過を遮断する。
According to this invention, when erasing written information in an EPROM, a voltage is applied to the liquid crystal film attached to the transmission window to make it transparent, and then ultraviolet rays or the like are transmitted therethrough. Under normal conditions, the liquid crystal film is made opaque to block the transmission of ultraviolet rays and the like without applying any voltage.

〔実施例〕 ゛ 以下第1図(a) 、 (b)に示す実施例に基づいて
この発明を説明する。なお、従来と同−又は相当部分に
は同一符号を付しその説明は省略する。この実施例によ
れば、透過窓(6)裏面側を被覆するように液晶膜(テ
)が被覆され、その長手方向端部からパンケージ(2)
端面に至るドライブ用電極(8)が引き出され、この電
極(8)端に端子(9)が取付けられている。
[Example] The present invention will be described below based on the example shown in FIGS. 1(a) and 1(b). In addition, the same reference numerals are given to the same or equivalent parts as in the conventional art, and the explanation thereof will be omitted. According to this embodiment, the liquid crystal film (te) is coated so as to cover the back side of the transmission window (6), and the pan cage (2) is coated from the longitudinal end of the liquid crystal film (te).
A drive electrode (8) extending to the end face is drawn out, and a terminal (9) is attached to the end of this electrode (8).

この端子(9)はさらに図示しない電圧源に接続されて
液晶膜(γ)に対して電圧を印加できるように構成され
ている。
This terminal (9) is further connected to a voltage source (not shown) so that a voltage can be applied to the liquid crystal film (γ).

したがって、上記端子(9)に電圧を印加するとドライ
ブ用電極(8)を介して液晶膜(7)に電圧が印加され
て、液晶膜(7)は紫外線等の透過に対して透明になる
。そのため、mpRou (1)の情報を消去するtめ
Kは、このように液晶膜(ア)に対して電圧全印加して
、同図(1))のようにX方向を透明にした後、紫外線
等を照射すれば、この紫外線等はwpRoM(1)に到
達してその書き込み情報を消去する。消去後に電圧を解
除すると液晶膜(ア)は同図(b)のようにY方向に透
明となりX方向に対して不透明になるため、このとき新
たな情報を書き込むようにすればよい。
Therefore, when a voltage is applied to the terminal (9), a voltage is applied to the liquid crystal film (7) via the drive electrode (8), and the liquid crystal film (7) becomes transparent to the transmission of ultraviolet rays and the like. Therefore, in order to erase the information in mpRou (1), after applying the full voltage to the liquid crystal film (A) and making it transparent in the X direction as shown in (1)), When irradiated with ultraviolet rays, etc., the ultraviolet rays, etc. reach wpRoM(1) and erase the written information. When the voltage is removed after erasing, the liquid crystal film (A) becomes transparent in the Y direction and opaque in the X direction as shown in FIG. 2B, so new information can be written at this time.

なお、上記実施例における液晶膜(7)に接着あるいは
蒸着などの手段によって形成される。
Note that it is formed on the liquid crystal film (7) in the above embodiment by means such as adhesion or vapor deposition.

なおまた、上記実施例では液晶膜(γ)への電圧供給用
端子金外部リード引出し端子(9)として設けた場合に
ついて説明したが、gFROM (1)のリード(4)
から供給するようにしても良く、ま几液晶膜(γ)をガ
ラス窓に接着又に蒸着するがガラス部(図示せず)全体
を液晶で構成しても良く、要は本発明の要旨を逸脱しな
い範囲で各種の変形が可能である。
Furthermore, in the above embodiment, the case where the terminal metal for voltage supply to the liquid crystal film (γ) was provided as an external lead extraction terminal (9) was explained, but the lead (4) of gFROM (1)
Alternatively, the liquid crystal film (γ) may be glued or vapor-deposited on the glass window, but the entire glass portion (not shown) may be made of liquid crystal. Various modifications are possible without departing from the above.

〔発明の効果〕〔Effect of the invention〕

以上この発明によれば、IIFROMの書き込み情報を
消去す池際に紫外線等の透過する窓に液晶膜を被覆して
、これに電圧を印加、解除することによって液晶膜をそ
れぞれ透明、不透明な状態にすることができる之゛め、
情報を消去するたびごとに、従来のように遮光シールを
着脱することが不要となり、gFROMに対する情報の
書込み、消去時間を短縮できるとともに、窓におけるガ
ラスに対する損傷をなくし得、正確な情報の書込み、及
び消去をすることができる。
As described above, according to the present invention, when erasing written information in the IIFROM, a liquid crystal film is coated on a window that transmits ultraviolet rays, and by applying and releasing a voltage to the window, the liquid crystal film is changed to a transparent state and an opaque state, respectively. Because you can do it,
It is no longer necessary to attach and remove a light-shielding seal as in the past every time information is erased, which reduces the time required to write and erase information to gFROM, and also eliminates damage to the glass in the window, allowing for accurate information writing. and can be deleted.

【図面の簡単な説明】[Brief explanation of drawings]

第1図(、り 、 (b)はこの発明に係るパッケージ
の一実施例を示す図で、同図(、)はその斜視図、同図
(b)はその横断面図、第2図(a) 、 (b)fl
従来のパッケージを示す図で、それぞれ第1図(、) 
、 (bJ相当図である。 図において、(1)はgpRoM、 (2)はパッケー
ジ、(6)は透過窓、(ア)は液晶膜、(8)はドライ
ブ用電極、(9)は端子である。 なお、各図中、同一符号は同−又は相当部分?示す。
FIG. 1(b) is a diagram showing an embodiment of the package according to the present invention, FIG. 1(,) is a perspective view thereof, FIG. a) , (b)fl
Figure 1 (,) shows the conventional packaging.
, (This is a diagram corresponding to bJ. In the figure, (1) is gpRoM, (2) is package, (6) is transmission window, (A) is liquid crystal film, (8) is drive electrode, (9) is terminal In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 紫外線消去可能リードオンリメモリICを収納するとと
もに、このICに書き込まれた情報を消去する紫外線等
の透過窓を介して透過させるべく形成された紫外線消去
可能リードオンリメモリICのパッケージにおいて、上
記透過窓を液晶膜によつて被覆して、この液晶膜に電圧
を印加することによつて上記紫外線等を透過させるべく
構成したことを特徴とする紫外線消去可能リードオンリ
メモリICのパッケージ。
In a package for an ultraviolet erasable read-only memory IC that houses an ultraviolet erasable read-only memory IC and is formed to transmit ultraviolet light or the like through a transmission window for erasing information written in the IC, the above-mentioned transmission window 1. A package for an ultraviolet erasable read-only memory IC, characterized in that the IC is covered with a liquid crystal film, and is configured to transmit the ultraviolet rays and the like by applying a voltage to the liquid crystal film.
JP61095538A 1986-04-24 1986-04-24 Package for ultraviolet ray erasable read-only memory ic Pending JPS62252153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61095538A JPS62252153A (en) 1986-04-24 1986-04-24 Package for ultraviolet ray erasable read-only memory ic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61095538A JPS62252153A (en) 1986-04-24 1986-04-24 Package for ultraviolet ray erasable read-only memory ic

Publications (1)

Publication Number Publication Date
JPS62252153A true JPS62252153A (en) 1987-11-02

Family

ID=14140339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61095538A Pending JPS62252153A (en) 1986-04-24 1986-04-24 Package for ultraviolet ray erasable read-only memory ic

Country Status (1)

Country Link
JP (1) JPS62252153A (en)

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