JPH025122U

JPH025122U -

Info

Publication number: JPH025122U
Application number: JP1988082887U
Authority: JP
Priority date: 1988-06-24
Filing date: 1988-06-24
Publication date: 1990-01-12

Description

[Brief explanation of drawings]

第１図ａは本考案に係る情報記録媒体の一構造
例を示す断面図、第１図ｂは第１図ａの内周側の
拡大図、第２図ａは従来の情報記録媒体の構造例
を示す断面図、第２図ｂは第２図ａの内周側の拡
大図である。１，１′……基板、２，２′……記録膜、３…
…内周スペーサ、４……外周スペーサ、５，５′
……内周側接着剤層、６，６′……外周側接着剤
層、７……中空部。 FIG. 1a is a sectional view showing an example of the structure of an information recording medium according to the present invention, FIG. 1b is an enlarged view of the inner circumferential side of FIG. 1a, and FIG. 2a is a structure of a conventional information recording medium. A sectional view showing an example, FIG. 2b is an enlarged view of the inner peripheral side of FIG. 2a. 1, 1'...Substrate, 2, 2'...Recording film, 3...
...Inner spacer, 4...Outer spacer, 5, 5'
... Inner circumferential adhesive layer, 6, 6'... Outer circumferential adhesive layer, 7... Hollow part.

Claims

[Scope of utility model registration request]

A pair of substrates having a recording layer on one side of at least one of the two disc-shaped substrates is bonded with an adhesive layer so that the recording layer is on the inside through an inner circumferential spacer and an outer circumferential spacer arranged concentrically. The sealing structure is such that the outer periphery of the inner spacer is located inside the innermost periphery of the recording layer, and the outer periphery of the inner adhesive layer is located inside the outer periphery of the inner spacer. An information recording device characterized in that an inner circumferential spacer and an inner circumferential adhesive layer are arranged, and further, the substrate surface from the outer circumferential position of the inner circumferential adhesive layer to the innermost circumferential position of the recording layer is a continuous plane. Medium.