JPS637596A - Package for non-volatile semiconductor memory device - Google Patents

Abstract

PURPOSE:To easily remove an ultraviolet ray transmission preventing seal by providing a recessed part on a surface adjacent to a glass window and passing the peripheral edge of the ultraviolet ray transmission preventing seal on the recessed part. CONSTITUTION:A seal removing groove 6 provided adjacent to the ultraviolet ray transmission glass window 4 on a cover member 2 has the peripheral edge of the ultraviolet ray transmission preventing seal 5 passing thereon. At the time of removing the ultraviolet ray transmission preventing seal 5, a jig such as a pincette is used for the groove 6, thereby, the seal can be easily removed and the removed seal can be used again. Thus, the groove is disposed adjacent to the ultraviolet ray transmission glass window 4 of a package for a non- volatile semiconductor memory device so as to pass the ultraviolet ray preventing seal peripheral edge on the groove, thereby, the seal can be easily removed and the seal can be reused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides an electrically programmable read-only memo IJ (UV-11EP) erasable by ultraviolet irradiation.
The present invention relates to a package for semiconductor storage devices that makes it easy to remove a seal that identifies written data in a ROM (ROM) and prevents accidental erasure.

[Conventional technology]

Figure @2 is a perspective view showing a conventional UV-EPROM pancage. In the figure, (1) is the package base, (
2) is the pan cage lid material, (3) is the lead terminal, (4
) is an ultraviolet transmitting glass window formed on the lid material (2), (
5) is an ultraviolet ray transmission prevention seal attached to the lid material (2) so as to cover the glass window (4).

Next, the operation will be explained. When using a UV-EPROM, first, a predetermined amount of ultraviolet light is irradiated onto the memory section in the pan cage through the ultraviolet-transmitting glass window (4). After that, the desired program data is programmed from the FROM programmer. After this, when using it as a read-only memory, the purpose is to easily identify the content and type of the program data, and to avoid inadvertent programming. In order to prevent data from being destroyed, a seal (5) for preventing ultraviolet transmission is pasted so as to completely cover the glass window (4).

[Problem that the invention seeks to solve]

Since the conventional UV-EPROM package is composed of one package as described above, a seal for preventing UV transmission (5 degrees) is used.
) After affixing the sticker (5), it is difficult to remove the sticker (5) for the purpose of changing the program, etc., and even if it can be removed, the sticker is damaged and cannot be used again. was there.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a UV-EP ROM pancase from which a seal for preventing ultraviolet transmission can be easily removed.

[Means for solving problems]

The pancage for a non-volatile semiconductor storage device according to the present invention has a groove for removing a seal for preventing ultraviolet transmission close to the ultraviolet transmitting glass of the package lid material.

[Effect]

The groove for removing the seal for preventing ultraviolet transmission in this invention is provided close to the ultraviolet transmitting glass, and when removing the seal for preventing ultraviolet transmission after pasting it,
A suitable jig is inserted into the groove to facilitate the removal and removal of the seal.

[Embodiments of the invention]

@ Figure 1 is a perspective view showing the configuration of an embodiment of this invention.
The same reference numerals as in the conventional example in FIG. 2 indicate equivalent parts, and duplication of explanation thereof will be avoided. In Fig. 1, F (6) is the cover material + 2) The seal groove provided close to the UV transmitting glass window (4) is the sushi groove, and the periphery of the UV transmitting prevention seal (5) is the groove. It is so that it passes over the top.

The operation of this embodiment as an EPROM is the same as that of the conventional example, but when removing the ultraviolet transmission prevention seal (5) in order to change the program data, a jig such as Vincent is inserted into the groove (6). It can be easily removed using the . The removed seal can then be used again.

In the above embodiment, a rectangular groove is formed, but the groove may have an arbitrary shape such as a circle.

〔Effect of the invention〕

As described above, according to the present invention, a groove is provided in the vicinity of the ultraviolet-transmissive glass window of the non-volatile semiconductor storage device pancage, and the periphery of the ultraviolet-ray prevention seal passes over the groove, so that the sole can be easily removed. This has the effect of making it easier to reuse the sol.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional pancase for a nonvolatile semiconductor memory device. In the figure, C1) is a pan cage base, (2) is a lid material, (4) is an ultraviolet light transmitting glass window, (5) is a seal for preventing ultraviolet light transmission, and (6) is a recess (groove). The same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A glass window that houses a variable threshold type semiconductor memory chip whose memory can be erased by ultraviolet irradiation, and that transmits the ultraviolet rays from the outside into the interior, and a seal that covers the glass window to prevent ultraviolet rays from transmitting. A package for a nonvolatile semiconductor memory device, characterized in that a recess is provided on the surface adjacent to the glass window, and a peripheral edge of the ultraviolet ray transmission prevention seal passes over the recess.