Patent ID: 6342333
Filing Date: 2002-01-29
Classification: C08G,G03F,H05K

Abstract:
A photosensitive resin composition comprising:an aromatic polyimide precursor including structural units of a general formula (I): â€ƒwherein A and B each independently represent a trivalent or tetravalent aromatic group; wherein X and Y each independently represent a divalent group not conjugating with A or B; wherein said resin composition is selected from the group consisting of (1) negative photosensitive compositions, wherein a portion of said polyimide film exposed to light portion is cross-linkable or polymerizable followed by curing, and an unexposed portion of said polyimde film is removable by a developer to reveal a pattern of the exposed portion, and (2) positive photosensitive compositions, wherein a portion of said polyimide film exposed to light is made more soluble and removable by a developer, leaving a pattern of an unexposed portion; wherein said negative photosensitive resin composition further comprises a photo-polymerization initiator, and a carbon-carbon unsaturated double bond in said polyimide precursor or a compound added to the composition; and wherein said positive photosensitive resin composition further comprises a compound capable of generating an acid upon exposure to light; and wherein said polyimide precursor of said positive photosensitive resin composition has a group selected from a carboxylic acid or a phenolic hydroxyl group.