Appeal No. 2001-2677
Application No. 08/625,008
The claimed subject matter is directed to a method for
cutting a ceramic block. A green ceramic block is prepared by
laminating a plurality of green ceramic sheets. The ceramic
sheets have been formed using an organic binder. The laminated
green ceramic sheets which form the green block are heat treated
to at least 50°C or higher. This gives the ceramic block a
Vickers hardness in the range of 20 to 100 kg/cm2. When these
blocks are cut with a dicing saw they exhibit surface roughness
values within the range of .05 to 0.15 :m.
Claim 8, reproduced below, is further illustrative of
the claimed subject matter.
8. A method of cutting a ceramic block, comprising the
steps of:
preparing a ceramic green block by laminating a
plurality of ceramic green sheets and applying a metallic layer
to a surface of at least one of said plurality of ceramic green
sheets so as to form an inner metallic portion in said ceramic
green block; said ceramic green block including a binder, in an
amount of at least 4 percent by weight of the block;
heat treating said ceramic green block at 50 degrees C
or higher so as to cure it and improve its hardness, thereby
giving said heat treated ceramic block a Vickers hardness in the
range of 20 to 100 kg/cm2; and
cutting said heat treated ceramic block with a dicing
saw.
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