JPH0574966A - Data deletion preventive label for eprom - Google Patents

Abstract

PURPOSE:To provide a data deletion preventive label which may be dealt with easily not to allow remaining of a bonding agent in the deleting window of an EPROM even under the condition that a label is peeled for reusing the EPROM. CONSTITUTION:As a label for preventing deletion of data which may be deposited on the surface of the package 1a of EPROM 1 to cover a deleting window 1b, the rear surface side of a label sheet 2a made of ultraviolet shielding material is coated with a bonding agent 2b in the rest of the area facing to the deletion window of the EPROM and then the label is attached on the package with the area 2c not coated with the bonding agent aligned with the position of the deleting window of EPROM. Thereby, the bonding agent of label does not adhere to the deleting window of the EPROM and the window surface is not contaminated with the bonding agent even under the condition that the label is peeled for reusing the EPROM. Therefore after the label is peeled, next data deletion and writing of new data can be started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data erasure preventing label which is attached to an EPROM and covers its erasing window.

[0002]

2. Description of the Related Art EPROM (erasable program)
mable ROM), especially FAMOS, which can erase data by irradiating ultraviolet rays, writes data to ROM products and then erases the data by blocking the ultraviolet rays on the surface of the package to prevent the data from being erased. A protective label is applied to cover the erase window of the EPROM.

FIG. 4 shows the structure of a data erasure prevention label that has been conventionally used and its use state. In the figure, 1 is an EPROM, 1a is its package, and 1b is an erasing window provided in the center of the package 1a. Reference numeral 2 denotes a data erasure prevention label which is used by being attached to the surface of the package 1a of the EPROM 1 as shown in FIG. 4 (c), and which is adhesive to the entire area of the back surface of the sheet 2a made of an ultraviolet light shielding material. Adhesive 2b is applied.

Then, the IC for the EPROM1 product is
After writing the data in the memory, the label 2 is applied to the surface of the package 1a so as to cover the erasing window 1b.

[0005]

By the way, the above-mentioned conventional data erasure prevention label has the following problems in terms of use. That is, when the data already written in the EPROM is erased and another data is written again for reuse, the data erasure prevention label once attached to the package 1a is removed, and then the data is erased and new data is written. It is necessary to attach the label again after performing the operation. However, in the case where the adhesive adhesive 2b is applied to the entire back surface of the label 2 as described above, the adhesive remains on the erasing window 1b of the EPROM 1 when the label 2 is peeled off. Moreover, if the erasing window is soiled with the adhesive, it will be an obstacle to erasing the written data and writing new data. Therefore, when the label 2 is peeled off, a troublesome work is required to wipe the surface of the erasing window 1b with alcohol or the like to remove the adhesive attached to the window surface.

The present invention has been made in view of the above points, and an object thereof is to provide data with good handling property in which no adhesive remains in the erase window of the EPROM even when the label is peeled off when the EPROM is reused. It is to provide an erasure prevention label.

[0007]

The above object can be achieved by the present invention by constructing a data erasure preventing label as follows. (1) A sheet made of an ultraviolet light shielding material is applied, and an adhesive is applied to the back surface side of the sheet except the area facing the erase window of the EPROM. (2) A base sheet having a transparent sheet on the back surface side of which the adhesive is applied to the remaining surface area excluding the area facing the erasure window of the EPROM, and the surface of the base sheet corresponding to the non-adhesive area of the base sheet It is composed of an ultraviolet light shielding mask attached to the side.

(3) A base sheet having a window opened in the surface area of the central portion of the sheet facing the erasing window of the EPROM, and an adhesive is applied to the back surface side of the base sheet to be fixedly attached to the front surface of the EPROM. It is composed of an ultraviolet light-shielding sheet that is repetitively attached to the base sheet so that peeling and re-attaching can be repeated. Further, in such a structure, a velcro tape can be used as a connecting means for bonding the base sheet and the ultraviolet light shielding sheet together.

[0009]

According to the above construction, when the data erasure prevention label is attached to the EPROM, the adhesive of the label does not adhere to the erasure window of the EPROM, and the EPROM is prevented.
No adhesive remains on the erasure window even when the label is peeled off when reused. Therefore, it is not necessary to clean the adhesive on the erase window, and immediately after the label is peeled off, the EPROM can be set in the eraser to erase the previously written data.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In each embodiment, the same members corresponding to those in FIG. 4 are designated by the same reference numerals. Embodiment 1 In FIG. 1, package 1 of EPROM 1
The data erasure prevention label 2 attached to the a so as to cover the erasure window 1b is made of a sheet of an ultraviolet light shielding material, and the rear surface side thereof except the central portion facing the erasure window 1b. As a result, a sticky adhesive 2b is applied to the remaining surface area. In addition, 2c shows a non-application surface area where the adhesive 2b is not applied.

The data erasure prevention label 2 is used by adhering the non-coated surface area 2c to the surface of the package 1a in alignment with the position of the erasure window 1b of the EPROM 1. In this pasted state, the non-adhesive surface area 2c of the adhesive is the erasing window 1
Since it overlaps b, the adhesive 2b does not adhere to the erasing window 1b. Therefore, the adhesive 2b does not remain in the erasing window 1b even when the label 2 is peeled off to reuse the EPROM 1.

Embodiment 2 In FIG. 2, a data erasure prevention label 2 is a transparent base sheet 21 adhered to a package 1a of an EPROM 1 and an ultraviolet light shield which is preliminarily attached to the central portion of the base sheet 21 in a superposed manner. It is a combination with the mask 22. Here, as shown in FIGS. 2 (a) and 2 (b), the base sheet 21 is a transparent sheet with the adhesive 2b applied to the rear surface side of the EPROM 1 excluding the area facing the erasing window 1b. A disc-shaped ultraviolet light shielding mask, which is made of an ultraviolet light shielding material in advance on the surface side of the base sheet by aligning with the adhesive non-application area 2c of the base sheet 21, as shown in FIG. 2 (c). Two
2 is attached. The outer dimensions of the light-shielding mask 22 are set to be slightly larger than the erasing window 1b of the EPROM 1.

According to this structure, the first embodiment described above is used.
Similarly, even if the label 2 is once attached to the package 1a of the EPROM 1 and then peeled off, there is no possibility that the adhesive 2b will remain attached to the erasing window 1b. Moreover, when the label 2 is attached to the package 1a of the EPROM 1, since the base sheet 21 is a transparent sheet, the rear erasing window 1b can be seen through the sheet. Therefore, the label 2 can be attached by visually aligning the ultraviolet light shielding mask 22 with the position of the erasing window 1b.

Embodiment 3: In FIG. 3, a data erasure prevention label 2 is covered with a first base sheet 23 fixedly attached to the surface of a package 1a of an EPROM 1 and a base sheet 23 which is superposed on the base sheet 23. It is a combination with the attached second ultraviolet light shielding sheet 24. Here, in the base sheet 23, a window 23a which is slightly larger than the erasing window is opened in the surface area of the sheet central portion facing the erasing window 1b of the EPROM 1, and the adhesive 22b is applied to the back surface side. There is. On the other hand, the ultraviolet light shielding sheet 24 is a sheet made of an ultraviolet light shielding material, and the above-mentioned base sheet 23
In order to make it possible to repeat peeling and re-adhesion, it is adhered and bonded via, for example, a magic tape 3.

With this configuration, when the EPROM 1 is reused, only the ultraviolet light shielding sheet 24 is peeled off from the base sheet 23 while the base sheet 23 of the label 2 is attached to the package 1a, and data is erased in this state.
In addition, new data is written. Therefore, as in the first and second embodiments, the erasing window 1b of the EPROM 1 is prevented from being soiled with the adhesive.

[0016]

Since the data erasure prevention label according to the present invention is constructed as described above, EPRO
When M is reused, it is possible to reliably prevent the adhesive from adhering to the erasing window of the EPROM and being contaminated with the label peeled off. This makes it possible to provide a data erasure prevention label that is easy to handle and does not require a cleaning operation for wiping the erasure window like a conventional label.

[Brief description of drawings]

FIG. 1 is a configuration diagram corresponding to a first embodiment of the present invention,
(A) is a front view of the data erasure prevention label, (b) is a back view of (a), and (c) is a usage state diagram in which the label is attached to an EPROM package.

FIG. 2 is a configuration diagram corresponding to Example 2 of the present invention,
(A) is a front view of a base sheet, (b) is a back view of (a), (c) is a plan view of an ultraviolet light shielding mask, (d) is a usage state diagram in which a label is attached to an EPROM package.

FIG. 3 is a configuration diagram corresponding to a third embodiment of the present invention,
(A) is a front view of the ultraviolet light shielding sheet, (b) is a back view of (a), (c) is a front view of the base sheet, (d) is a back view of (c), and (e) is a label EPROM. Usage diagram attached to the package

4A and 4B are configuration diagrams of a conventional data erasure prevention label, where FIG. 4A is a front view of the label, FIG. 4B is a rear view of FIG. 4A, and FIG. Use condition diagram

[Explanation of symbols]

 1 EPROM 1a Package 1b Erasing window 2 Data erasure prevention label 2a UV light shielding material sheet 2b Adhesive 2c Non-adhesive surface area 21 Transparent base sheet 22 UV light shielding mask 23 Base sheet 24 UV light shielding sheet 3 Magic tape

Claims (4)

[Claims] 1. A data erasure prevention label which is adhered to the front surface of an EPROM and covers the erasure window, wherein a sheet made of an ultraviolet light shielding material is used, and a rear surface side thereof except an area facing the erasure window of the EPROM. An EPROM data erasure prevention label, characterized in that an adhesive is applied to the remaining surface area. 2. A data erasure prevention label that covers the erasure window by adhering to the front surface of an EPROM, wherein a transparent sheet has an adhesive on the rear surface side of the EPROM except for the area facing the erasure window of the EPROM. E comprising a coated base sheet and an ultraviolet light shielding mask attached to the surface side of the base sheet corresponding to the non-adhesive area of the base sheet.
PROM data erasure prevention label. 3. A data erasure prevention label which covers the erasure window by adhering to the front surface of the EPROM, wherein the window is opened in the surface area of the central portion of the sheet facing the erasure window of the EPROM and the back surface side thereof. It is characterized by comprising a base sheet to which an adhesive is applied and which is fixedly stuck to the surface of the EPROM, and an ultraviolet light shielding sheet which is repetitively attached to the base sheet so that peeling and re-sticking can be repeated. EPROM data erasure prevention label. 4. The EPROM according to claim 3, wherein the base sheet and the ultraviolet light shielding sheet are attached with a velcro tape.
Data erasure prevention label.