Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Nihon Almit Co., Ltd.

Kazuhiko Kaneko

Hideki Ito

Shotoku Takami

Kazutaka Aoki

Ryo Hoshino

Takeo Igarashi

Tadashi Sawamura

Yukio Maeda

A solder paste for soldering micro components which suppress electro-migration is provided. The solder paste comprising: a powdered Pb-free soldering alloy comprising Cu of 0.1&#x2dc;3.0 wt. % and In of 0.5&#x2dc;8.0 wt. % simultaneously in addition to Sn; and a pasty or liquid flux; the powdered Pb-free soldering alloy and the pasty or liquid flux being mixed; whereby effectively suppressing electro-migration occurring at a solder bonding portion. It is possible to add Ag, Sb, Ni, Co, Fe, Mn and Cr as a strength improvement element, Bi and Zn as a melting point drop element and P, Ga and Ge as an anti-oxidant element to the powdered Pb-free soldering alloy.

Solder paste for bonding micro components

Pigment compositions each contain an organic pigment and at least one compound selected from compounds represented by the following formula (II), respectively:A-N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,B&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E orC&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,wherein A represents a substituted or unsubstituted phenyl group, B represents a substituted or unsubstituted &#x3b2;-naphthyl group, C represents a substituted or unsubstituted &#x3b1;-anthraquinonyl group, D represents a particular substituted aromatic group, and E represents a substituted or unsubstituted phenyl group, with a proviso that the compounds each have at least one substituent represented by &#x2014;COOM or &#x2014;SOM in which M represents a hydrogen atom, metal atom, ammonium group, organic amine group or quaternary ammonium group. Colored compositions making use of the pigment compositions and color filters making use of the colored compositions are also disclosed.

Pigment compositions, colored compositions making use of the pigment compositions, and color filters

Pigment compositions each contain an organic pigment and at least one compound selected from compounds represented by the following formulas (I) or (II), respectively:A-N&#x2550;N-D, B&#x2014;N&#x2550;N-D or C&#x2014;N&#x2550;N-D&#x2003;&#x2003;Formula (I)A-N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,B&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E orC&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E&#x2003;&#x2003;Formula (II)wherein A represents a substituted or unsubstituted phenyl group, B represents a substituted or unsubstituted &#x3b2;-naphthyl group, C represents a substituted or unsubstituted &#x3b1;-anthraquinonyl group, D represents a particular substituted aromatic group, and E represents a substituted or unsubstituted phenyl group, with a proviso that the compounds each have at least one substituent represented by &#x2014;COOM or &#x2014;SOM in which M represents a hydrogen atom, metal atom, ammonium group, organic amine group or quaternary ammonium group. Colored compositions making use of the pigment compositions and color filters making use of the colored compositions are also disclosed.

Growing community of inventors

Chuo-ku, Japan

Kazuhiko Kaneko