Reference

Benzotriazole-H2O2-Al2O3 abrasive chemical-mechanical polishing compositions for CoFeNi structures in alumina fill layers of thin film magnetic heads

Benzotriazole-H2O2-Al2O3 abrasive chemical-mechanical polishing compositions for CoFeNi structures in alumina fill layers of thin film magnetic heads. Guthrie, Hung-Chin; Jiang, Ming; Lara, Nick (USA ). U.S. Pat. Appl. Publ. US 2006042173 A1 2 Mar 2006,6 pp. (English). (United States of America). CODEN: USXXCO. APPLICATION: US 2004-931846 31 Aug 2004. DOCUMENT TYPE: Patent CA Section: 57 (Ceramics) Section cross-reference(s): 56, 77 Methods for polishing and cleaning a wafer having CoFeNi structures in alumina fill to achieve corrosion-free, smooth, and planar surface, are described. A preferred CMP polishing compd. includes alumina abrasive particulates, 1H-Benzotriazole and hydrogen peroxide (H2O2) in a concn. of 4-12%. Preferably, H2O2 concn. is ~6% and the pH is ~4.0 at polishing pressure of 6 psi. A cleaning soln. for CoFeNi structures in alumina fill, preferably includes 4-Methyl-1H-Benzotriazole, 5-Methyl-1H-Benzotriazole, hydrogenated 4-Methyl-1H-Benzotriazole, hydrogenated 5-Methyl-1H-Benzotriazole, sodium octanoate, and water.

Polymer sheets with surface decorative effects of contrasting gloss

Polymer sheets with surface decorative effects of contrasting gloss. Schmidle, Claude J.; Varadhachary, Seevaram N. (Congoleum Corp., USA). U.S. US 4491616 A 1 Jan 1985, 13 pp. Cont. of U.S. Ser. No. 382,895, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: ICM: B32B003-30. ICS: B05D003-06. NCL: 428158000. APPLICATION: US 84-582157 27 Feb 1984. PRIORITY: US 82-382895 28 May 1982. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 38 The title sheets are prepd. by coating them with a printing compn. in a pattern with certain areas contg. photoinitiators, coating the pattern with a radiation- and heat-curable compn., heating to gel the compn. and give a matte surface, exposing the surface to actinic radiation to cure areas contg. photoinitiators and secure their matte appearance, and heating to cure the entire compn. and make the remaining areas glossy. Embossing is achieved together with contrasting gloss by having a foamable substrate and producing areas contg. a blowing agent in addn. to the photoinitiator. Thus, a felted asbestos sheet was coated with a plastisol contg. 30.2 parts PVC [9002-86-2] and 1.1 parts azodicarbonamide [123-77-3] blowing agent; heated ~3 min at ~300° F to gel without foaming, printed with a vinyl acetate-vinyl chloride polymer (I) ink, printed with an ink contg. I 10.5, benzotriazole [95-14-7] blowing inhibitor 10, and Ph2CO [119-61-9] photoinitiator 10 parts; coated with a plastisol contg. 100 parts PVC and 20 parts trimethylolpropane trimethacrylate [3290-92-4], heated ~3 min at ~300° F, exposed to UV (200 W/in) for 1 s in air and 1 s in N, and heated ~2.75 min at ~395° F.