摘要:
An epoxy resin composition contains (A) an epoxy resin, (B) a curing agent, (C) an inorganic filler, and (D) catalyzed microcapsules containing an imidazole compound or organic phosphorus compound and having a mean particle size of 0.5-50 &mgr;m, the quantity of the catalyst leached out from the microcapsules in o-cresol at 30° C. for 15 minutes being at least 70% by weight of the entire catalyst quantity. The composition is suited for semiconductor package encapsulation since it has satisfactory catalyst latency, storage stability and cure.
摘要:
An epoxy resin composition comprising (A) 20-80 parts by weight of an epoxy resin, (B) 20-80 parts by weight of a curing agent, (C) 0.1-50 parts by weight of a phosphorus-containing flame retardant, and (D) 200-1,200 parts by weight of an inorganic filler cures into products having improved high-temperature exposure resistance, flame retardancy, and reflow cracking resistance. The composition eliminates blending of antimony trioxide and brominated compounds and is useful in encapsulating semiconductor devices for imparting high-temperature reliability.
摘要:
An epoxy resin composition comprising: (A) an epoxy resin having at least three epoxy groups per molecule and an epoxy equivalent of 170 or lower; (B) an epoxy resin having a phenolic nucleus and two epoxy groups in such an amount that a weight ratio of the epoxy resin (B) to the epoxy resin (A) ranges from 35/65 to 65/35; (C) a phenolic curing agent in such an amount that a molar ratio of phenolic hydroxyl groups to the whole epoxy groups in the composition ranges from 0.5 to 1.5; and (D) an inorganic filler in an amount of from 86 to 92 wt %, based on a total weight of the composition. The composition provides encapsulated semiconductor devices much less warped than those encapsulated with a conventional composition.
摘要:
An epoxy resin composition comprising: (A) an epoxy resin having at least three epoxy groups per molecule and an epoxy equivalent of 170 or lower; (B) an epoxy resin having a phenolic nucleus and two epoxy groups in such an amount that a weight ratio of the epoxy resin (B) to the epoxy resin (A) ranges from 35/65 to 65/35; (C) a phenolic curing agent in such an amount that a molar ratio of phenolic hydroxyl groups to the whole epoxy groups in the composition ranges from 0.5 to 1.5; and (D) an inorganic filler in an amount of from 86 to 92 wt %, based on a total weight of the composition. The composition provides encapsulated semiconductor devices much less warped than those encapsulated with a conventional composition.
摘要:
An epoxy resin composition is provided comprising (A) an epoxy resin, (B) a phenolic resin curing agent, (C) an inorganic filler, (D) a cure accelerator, (E) an adhesion promoter, and (F) a metal oxide. The metal oxide (F) is a combination of a magnesium/aluminum ion exchanger, a hydrotalcite ion exchanger, and a rare earth oxide in a ratio of 0.5-20:0.5-20:0.01-10 pbw, relative to 100 pbw of epoxy resin (A) and curing agent (B) combined.
摘要:
An epoxy resin composition comprising (A) a polyfunctional epoxy resin, (B) a phenolic resin, (C) an inorganic filler, and (D) curing catalyst-containing microcapsules having a mean particle size of 0.5-50 &mgr;m is suited for semiconductor package encapsulation since it minimizes the warpage of packages and has satisfactory catalyst latency, storage stability and cure.
摘要:
An epoxy resin composition comprising (A) a naphthalene ring-containing epoxy resin, (B) a specific phenolic resin preferably in admixture with a conventional phenolic resin, especially naphthalene ring-containing phenolic resin, and (C) an inorganic filler shows good flow and cures to products having low modulus of elasticity, a low coefficient of expansion, high Tg irrespective of low stresses, and minimized water absorption. Then semiconductor devices encapsulated with the present composition remain highly reliable even after being subject to thermal shocks upon surface mounting.
摘要:
A thermosetting resin composition comprising (A) a naphthalene ring-bearing epoxy resin, (B) a dicyclopentadiene-modified phenolic resin, and (C) an inorganic filler is suitable for encapsulating semiconductor devices since the composition cures into a product having a low coefficient of expansion, good adhesion and low moisture absorption.
摘要:
An epoxy resin composition comprising (A) an epoxy resin having at least two epoxy groups in a molecule, (B) a phenolic resin having at least one naphthalene ring in a molecule, and (C) an inorganic filler has improved flow and cures into products having a low coefficient of expansion, high Tg, and low moisture absorption. The composition is thus suitable for encapsulating semiconductor devices.
摘要:
When a second detector determines that a character image has a halftone (YES in #1) and a third detector (48) determines that a font size of the character image is equal to or greater than a threshold value β and equal to or smaller than a threshold value α (YES in step #4), a fourth detector determines whether a presently focused pixel constitutes a particular portion of a character (step #5). When the fourth detector determines that the pixel data of the presently focused pixel constitutes the particular portion of the character (YES in step #5), the image processing section sets the pixel data to be subjected to a second screen processing which is performed at a higher gradation level (step #6).