Sanshin has been involved in the development of our own technologies based on the technologies and experiences in the manufacture of lapping film polishing machines through the partnership with lapping film manufacturers. As a result, we successfully researched and developed high-quality, high-reliability ultra-precision polishing systems in diversified mechatronics fields covering the electronic industry segments up to shafts and gears of automotive industry parts as technologies inherent in Japan, thus responding widely to user needs.Intended Work PieceRound surface Magnetic head VTR head MR headConcave-convex surface Various concave-convex lens Aspherical lens Optical fiber ferrule Automotive partsPlain disc surface Stamper for CD and DVD Automotive parts Semiconductors, silicon, devicePlain surface PDP, LCD, and EL substrates Thin-film and thick-film substrates Multilayer substrates, buildup substrates Ceramic substrates LCD cell plate cleanersChamfering LCD substrates Various glass substrates Silicon wafers Multilayer substratesOuter diameter Shafts Camshafts Crankshafts Small-diameter shaftsInner diameter Shafts with inner diameter up to 6 mm Tapered inner diameter Stepped inner diameterAdvantages of Lapping Film Polishing1.Super-precision finish down to 0.00001mm is possible2.Control of roughness is easy. The lapping film types are abundant.3.Abrasive grains that ensure uniform finish4.Lapping finishes according to applications are possible by selecting abrasive grain materials.5.Fine deburring can be done along with processing of surface roughness.6.The method can be applied for both dry and wet types. Although the dry type is employed in general, powder dust is seldom generated.7.The processing environment is clean and compact. In addition, handling can be done speedily. Further, in case the dry type can be used, the method contributes to labor saving in the cleaning process.8.The super-finish processing requires a certain level of skill, but inexperienced persons can do the work.9.There is no burden of grinding compensation to deal with wear of grinding stone, and the replacement of lapping film is easy.