摘要:
Copolyamic acid is obtained from tetracarboxylic acid dianhydride, diamine and a fluorinated diamine and/or fluorinated tetracarboxylic acid dianhydride; and optionally ester or amine salt derivative thereof to obtain radiation sensitive polymer; and low optical high thermally stable polyimide from curing the above polyamic acid and/or derivative thereof.
摘要:
A multilevel electronic package comprising at least two levels, each level including a poly(aryl ether benzimidazole), a polymide and copper. A process of preparing this package is disclosed. Several novel poly(aryl ether benzimidazoles) useful in preparing this package are also set forth.
摘要:
The present invention relates to an improved process for forming negative tone images of photosensitive polyimides on a substrate having improved wall angles.
摘要:
The reactive ion etching and thermal flow resistance of a resist image is enhanced by contacting the resist image with an alkyl metal compound of magnesium or aluminum.
摘要:
A modified solid support for use in solid phase synthesis which comprises:a solid support having a linker group extending therefrom having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are each independently selected from the group consisting of alkyl, cycloalkyl, aryl, alkoxy, aryloxy, fluorine, chlorine, iodine and bromine.
摘要:
Block copolymers of polyimide and poly (phenylquinoxaline) have been synthesized. They are useful, particularly as dielectric layers in thin film multilayer structures. The most preferred embodiments are formed from polyimides which are those from pyromellitic dianhydride and oxydianiline. The most preferred poly (phenylquinoxaline) is a monofunctional oligomer, which yields the best microstructure.
摘要:
A modified solid-support for use as a supported reagent for use in reduction reactions, including reductive amination comprising a solid-support having an tetrasubstituted ammonium cation species ionically bonded to a borohydride anion species extending therefrom having the general formula: wherein P is a solid-support, S is a spacer group selected from the group consisting of alkylene, {including —(CH2)n—}, alkyleneoxy {including -0(CH2)n—}, alkylenethio {including —S(CH2)n—} and alkylenecarboxy, {including —O(O)C—(CH2)n—}, n=2-16. R1, R2, R3 and R are each independently selected from the group consisting of alkyl, cycloalkyl, haloalkyl and aryl. Y equals 1, 2 or 3. H is hydrogen or deuterium.
摘要:
A multilevel electronic package comprising at least two levels, each level including a poly(aryl ether benzimidazole), a polymide and copper. A process of preparing this package is disclosed. Several novel poly(aryl ether benzimidazoles) useful in preparing this package are also set forth.
摘要:
Hot roll fusers are made with a matrix resin which is an elastomer having a glass transition between 90.degree. C. and 160.degree. C. and a structure represented by the formula X--Ar--Y--Ar--X wherein Ar is an aromatic ring structure, Y is O, S, C.dbd.O, SO.sub.2, C(CH.sub.3).sub.2, C(CF.sub.3).sub.2, CH.sub.2 or (CF.sub.2).sub.n and X is --O--C.tbd.N, --C.tbd.CH or ##STR1##