The fabrication of ideal diamond disk(IDD)by casting diamond film on silicon wafer  

作　　者：Chen Ying-Tung Sung James C. Kan Ming-Chi Chang Hsiao-Kuo Sung Michael 

机构地区：[1]Department of Mechatronic,Energy and Aerospace Engineering,National Defense University [2]KINIK Company,64,Chung-San Rd.,Ying-Kuo,Taipei Hsien 239,Taiwan [3]National Taiwan University [4]National Taipei University of Technology [5]KINIK Company,64,Chung-San Rd.,Ying-Kuo [6]National Cheng-Kung University [7]Advanced Diamond Solutions,Inc.,351 King Street Suite 813,San Francisco,CA 94158,USA

出　　处：《金刚石与磨料磨具工程》2008年第S1期130-133,142,共5页Diamond & Abrasives Engineering

摘　　要：With the relentless densification of interconnected circuitry dictated by Moore’ s Law,the CMP manufacture of such delicate wafers requires the significant reduction of polishing pressure of integrated circuits,not only globally,but also locally on every tip of the pad asperities.Conventional diamond disks used for dressing the polyurethane pads cannot produce asperities to achieve such uniformity.A new design of diamond disk was fabricated by casting diamond film on a silicon wafer that contains patterned etching pits. This silicon mold was subsequently removed by dissolution in a hydroxide solution.The diamond film followed the profile of the etching pits on silicon to form pyramids of identical in size and shape.The variation of their tip heights was in microns of single digit that was about one order of magnitude smaller than conventional diamond disks for CMP production.Moreover,the diamond film contained no metal that might contaminate the circuits on polished wafer during a CMP operation.The continuous diamond film could resist any corrosive attack by slurry of acid or base.Consequently,in-situ dressing during CMP is possible that may improve wafer uniformity and production throughput.This ideal diamond disk(IDD) is designed for the future manufacture of advanced semiconductor chips with node sizes of 32 nm or smaller.With the relentless densification of interconnected circuitry dictated by Moore' s Law,the CMP manufacture of such delicate wafers requires the significant reduction of polishing pressure of integrated circuits,not only globally,but also locally on every tip of the pad asperities.Conventional diamond disks used for dressing the polyurethane pads cannot produce asperities to achieve such uniformity.A new design of diamond disk was fabricated by casting diamond film on a silicon wafer that contains patterned etching pits. This silicon mold was subsequently removed by dissolution in a hydroxide solution.The diamond film followed the profile of the etching pits on silicon to form pyramids of identical in size and shape.The variation of their tip heights was in microns of single digit that was about one order of magnitude smaller than conventional diamond disks for CMP production.Moreover,the diamond film contained no metal that might contaminate the circuits on polished wafer during a CMP operation.The continuous diamond film could resist any corrosive attack by slurry of acid or base.Consequently,in-situ dressing during CMP is possible that may improve wafer uniformity and production throughput.This ideal diamond disk(IDD) is designed for the future manufacture of advanced semiconductor chips with node sizes of 32 nm or smaller.

关 键 词：CMP pad CONDITIONER DIAMOND film CVD Moore’s Law 32 nm node 

分 类 号：TQ164[化学工程—高温制品工业]