Patents by Inventor Lin-chiu Chiang
Lin-chiu Chiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6582885Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a dicarboxylic acid anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: October 18, 2001Date of Patent: June 24, 2003Assignee: Nippon Mektron, Ltd.Inventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6486290Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a dicarboxylic acid anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for, general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: February 26, 1999Date of Patent: November 26, 2002Assignee: Nippon Mektron, LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Publication number: 20020045127Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a dicarboxylic acid anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: ApplicationFiled: October 18, 2001Publication date: April 18, 2002Inventors: Lin-Chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6365324Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a 4,4′-(hexafluoroisopropylidene)diphthalic acid dianhydride, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: March 26, 1999Date of Patent: April 2, 2002Assignee: Nippon Mektron, LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6245484Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a dicarboxylic acid anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: February 1, 2000Date of Patent: June 12, 2001Assignee: Nippon Mektron LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6232039Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a carboxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a carboxyl group-containing diamine and an aromatic or alicyclic diamine with a 4,4′-(hexafluoroisopropylidene)diphthalic acid dianhydride, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: January 28, 2000Date of Patent: May 15, 2001Assignee: Nippon Mektron LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6096850Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a hydroxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a hydroxyl group-containing diamine and an aromatic or alicyclic diamine with a 4,4'-(hexafluoroisopropylidene)diphthalic acid dianhydride, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: February 26, 1999Date of Patent: August 1, 2000Assignee: Nippon Mektron LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6077924Abstract: Polyimide is produced by reacting two kinds of diamine compounds consisting of diaminopolysiloxane and a hydroxyl group-containing diamine or three kinds of diamine compounds consisting of diaminopolysiloxane, a hydroxyl group-containing diamine and an aromatic or alicyclic diamine with a dicarboxylic acid anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, thereby once forming a polyamic acid, and subjecting the polyamic acid to polyimidization reaction. The resulting polyimide itself is soluble in low boiling organic solvents for general purpose use, typically methyl ethyl ketone. A photosensitive composition comprising the polyimide, a photo crosslinking agent and a photo acid-generating agent forms a negative type polyimide pattern upon development with an aqueous alkali solution.Type: GrantFiled: February 26, 1999Date of Patent: June 20, 2000Assignee: Nipopon Mektron LimitedInventors: Lin-chiu Chiang, Jenq-Tain Lin, Nobuyuki Sensui
-
Patent number: 6025461Abstract: A photosensitive polyimide, which comprises a copolymer of (A) three diamine compounds mixture consisting of a diaminopolysiloxane, a hydroxyl group-containing diamine or carboxyl group-containing diamine and 1,4-bis[2-(3-aminobenzoyl)ethenyl]benzene with (B) an aromatic tetrocarboxylic acid dianhydride or a dicarboxylic anhydride having a 2,5-dioxotetrahydrofuryl group as one acid anhydride group, is soluble in all-purpose low boiling organic solvents, typically methyl ethyl ketone and provides a negative type photosensitive polyimide, which is developable with an aqueous alkaline solution.Type: GrantFiled: August 5, 1998Date of Patent: February 15, 2000Assignee: Nippon Mektron, LimitedInventors: Lin-Chiu Chiang, Jeng-Tain Lin
-
Patent number: 5986038Abstract: An adhesive composition comprising a fluorinated elastomer having dicyclopropane rings formed by reaction of chloroform with unsaturated bonds introduced into the molecule of fluorinated elastomer by an alkali treatment, as an adhesive component has a good room temperature adhesiveness and very distinguished electric characteristics perse such as a high insulation resistance, a low dielectric constant, a low dielectric loss tangent, etc. and is effectively applied to adhesion of electronic materials in printed substrates, etc.Type: GrantFiled: March 5, 1998Date of Patent: November 16, 1999Assignees: Nippon Mektron, Limited, The Central Synthetic Rubbers Research InstituteInventors: Lin-chiu Chiang, Jenq-Tain Lin, Haruyoshi Tatsu, Lev Moiseevich Kogan, Anatoli Stepanovich Skornyakov, Tat'yana Borisovna Zapevalova, Olga Viktorinovna Blagodatova, Sergei Vasil'evich Sokolov
-
Patent number: 5942592Abstract: A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane, an alicyclic diamine and an aromatic diamine with an aromatic tetracarboxylic acid anhydride, followed by polyimidization reaction of the resulting polyamic acid forms a heat-resistant adhesive by adding an epoxy resin, a diamine-based curing agent and an organic solvent thereto, The formed adhesives provides a distinguished curling resistance without any warp when the resulting siloxane polyimide soluble in ordinary organic solvents is used as a main component of the adhesive for bonding between a base material and a copper foil of a flexible printed substrate.Type: GrantFiled: February 3, 1998Date of Patent: August 24, 1999Assignee: Nippon Mektron, LimitedInventors: Dong Zhao, Hiroshi Sakuyama, Tomoko Katono, Lin-chiu Chiang, Jeng-Tain Lin
-
Patent number: 5859181Abstract: A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane and an alicyclic diamine with an aromatic tetracarboxylic acid anhydride, followed by polyimidization reaction of the resulting polyamic acid forms a heat-resistant adhesive by adding an epoxy resin, a diamine-based curing agent and an organic solvent thereto, The formed adhesives show a distinguished heat-resistant adhesiveness when the resulting siloxane polyimide soluble in ordinary organic solvents is used as a main component of the adhesive for bonding between a base material and a copper foil of a flexible printed substrate. By further addition of a fluorinated resin to the heat-resistant adhesive, the adhesiveness can be more improved.Type: GrantFiled: December 17, 1997Date of Patent: January 12, 1999Assignee: Nippon Mektron, LimitedInventors: Dong Zhao, Hiroshi Sakuyama, Tomoko Katono, Lin-chiu Chiang, Jeng-Tain Lin
-
Patent number: 5849932Abstract: A novel bismaleimide compound having the following formula: ##STR1## is synthesized from 1,3-bis(aminomethyl)cyclohexane and maleic anhydride, and is readily soluble in a variety of ordinary low boiling point organic solvents.Type: GrantFiled: February 26, 1997Date of Patent: December 15, 1998Assignee: Nippon Mektron, LimitedInventor: Lin-chiu Chiang