Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1995-06-07
1998-02-17
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
523220, 523223, 523424, 524492, 524606, L08K 336, L08K 718
Patent
active
057192251
ABSTRACT:
A molding resin composition containing, in a resin, a filler comprising a globular powder of which mean particle diameter is not smaller than 0.1 .mu.m and not greater than 1.5 .mu.m (x component), a globular powder of which mean particle diameter is not smaller than 2 .mu.m and not greater than 15 .mu.m (y component) and a globular powder of which mean particle diameter is not smaller than 20 .mu.m and not greater than 70 .mu.m (z component), wherein proportions of the x, y and z components based on the total volume of x, y and z components are not smaller than 10% by volume and not greater than 24% by volume, not smaller than 0.1% by volume and not greater than 36% by volume and not smaller than 57% by volume and not greater than 76% by volume, exhibits an excellent fluidity even when loaded with a high percentage of filler. Further, their cured products are lowered in the moisture absorption and thermal expansion coefficient of which increases result from the resin itself present in the cured product. Further, a semi-conductor package sealed with the resin composition exhibits a high package crack resistance. The resin composition is suitable for use as a sealing material for semi-conductors, and extensively applicable to other uses requiring a high-percentage loading of filler.
REFERENCES:
patent: 5137940 (1992-08-01), Tomiyoshi et al.
WPI Abstract Accession No. 92-386501/47 & JP 04285617A (Mitsubishi) 09 Oct. 1992.
WPI Abstract Accession No. 90-364562/49 & JP 02261856A (Toshiba) 24 Oct. 1990.
JAPIO Abstract 03458211 & JP 03121111A (Mitsubishi) 23 May 1991.
Akiba Masatsugu
Hirano Yasuhiro
Saito Noriaki
Shiomi Yutaka
Sumitomo Chemical Company Ltd.
Szekely Peter A.
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