Nitto-denko Corporation

Shuuhei Murata

Yoshihiro Uetani

Keisuke Kii

Takeshi Matsumura

Katsuhiko Kamiya

Yutaka Kishii

Michio Satsuma

Hironao Ootake

Mutsuko Yamaguchi

Tomoaki Ichikawa

Provided is a dicing die-bonding film which is excellent in balance between retention of a semiconductor wafer upon dicing and releasability upon picking up. Disclosed is a dicing die-bonding film comprising a dicing film having a pressure-sensitive adhesive layer on a substrate material, and a die-bonding film formed on the pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer contains a polymer including an acrylic acid ester as a main monomer, 10 to 40 mol % of a hydroxyl group-containing monomer based on the acrylic acid ester, and 70 to 90 mol % of an isocyanate compound having a radical reactive carbon-carbon double bond based on the hydroxyl group-containing monomer, and is also cured by irradiation with ultraviolet rays under predetermined conditions after film formation on the substrate material, and wherein the die-bonding film contains an epoxy resin, and is also bonded on the pressure-sensitive adhesive layer after irradiation with ultraviolet rays.

Dicing/die bonding film

A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film. The partially crosslinked adhesive-supported porous film for battery separator, includes a porous film substrate having supported thereon a partially crosslinked adhesive that is partially crosslinked by preparing a reactive polymer having a functional group in the molecule and capable of being crosslinked upon reaction with a polyfunctional compound having reactivity with the functional group and then reacting the reactive polymer with a polyfunctional compound.

Partially crosslinked adhesive-supported porous film for battery separator and its use

A dicing die-bonding film having a pressure-sensitive adhesive layer on a base and a die-bonding film on the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer comprising an acrylic polymer comprising acrylic ester A represented by CH&#x2550;CHCOOR(where Ris an alkyl group having 6-10 carbon atoms), acrylic ester B represented by CH&#x2550;CHCOOR(where Ris an alkyl group having 11 carbon atoms or more), a hydroxyl group-containing monomer, and an isocyanate compound having a radical reactive carbon-carbon double bond where the ratios of components are 40-10 mol % of the acrylic ester B with respect to 60-90 mol % of the acrylic ester A, 10-30 mol % hydroxyl group-containing monomer with respect to 100 mol % of the total of the acrylic ester A and the acrylic ester B, and 70-90 mol % isocyanate compound with respect to 100 mol % of the monomer containing a hydroxl group.

Dicing die-bonding film

A uniform gel electrolyte having high durability and use thereof, in particular, batteries or capacitors using such a gel electrolyte. The gel electrolyte includes a gel composition containing an electrolyte salt, a solvent for the electrolyte salt, and a polymer matrix, wherein the polymer matrix comprises a crosslinked polymer prepared by polymerizing a bifunctional (meth)acrylate represented by the following formula (I): wherein R represents a divalent organic group, and Rrepresents a hydrogen atom or a methyl group.

Gel electrolyte, process for producing the same, and use thereof

An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.

Growing community of inventors

Ibaraki, Japan

Shuuhei Murata