Sheet-like ceramic substrate for tip parts

Details Sheet-like ceramic substrate for tip parts Sheet-like ceramic substrate for tip parts

1990-12-27

1992-12-29

Loney, Donald J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428120, 428192, 428901, 156 89, 156196, 338306, 338315, 338333, 174138G, 174138J, B32B 328, H01C 1012

Patent

active

051750449

ABSTRACT:
A sheet-like ceramic substrate for tip parts is provided which can effectively prevent occurrence of a crack thereof. The ceramic substrate comprises a ceramic sheet 7 having first and second primary dividing grooves 2a and 2b and first and second secondary dividing grooves 3a and 3b formed at mutually corresponding locations of the opposite faces thereof. The depth of the dividing grooves 2a, 2b, 3a and 3b is comparatively small, and while the opposite ends of the first primary dividing grooves 2a and on one face of the ceramic sheet 7 extend to a pair of opposing sides 7b of the ceramic sheet 7, the opposite ends of the second primary dividing grooves 2b on the other face of the ceramic sheet 7 are spaced from the opposing sides 7b, and the opposite ends of the first and second secondary dividing grooves 3a and 3b are spaced from the other pair of opposing sides 7a of the ceramic sheet 7.

REFERENCES:
patent: 4567086 (1986-01-01), Fukuda et al.
patent: 4757298 (1988-07-01), Nishikawa et al.
patent: 5041315 (1991-08-01), Searle et al.

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