Pigmented silicon nitride

Details Pigmented silicon nitride Pigmented silicon nitride

1998-03-11

1999-12-21

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 87, 501 972, 501 973, C04B 35587

Patent

active

060048956

ABSTRACT:
A pigmented silicon nitride composition suitable for hot pressing into near shape articles of manufacture having a cosmetically uniform color. The composition comprises high purity, sub-micrometer, alpha silicon nitride powder mixed with a sintering aid and a pigmenting material. In a preferred embodiment the pigmenting material comprises molybdenum carbide, although carbides of other elements are applicable as well. The resulting hot pressed article is cosmetically superior to non-pigmented silicon nitride. Such articles are especially useful for processing semiconductor components where appearance in the form of color uniformity is a strict requirement for the manufacturer and the customer.

REFERENCES:
patent: 5399536 (1995-03-01), Yamakawa et al.
patent: 5691261 (1997-11-01), Takahashi et al.
patent: 5804521 (1998-09-01), Takahashi et al.
patent: 5908796 (1999-06-01), Pujari et al.

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