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Over-all flow TM This document is strictly confidential and proprietary of SMIC. It must not be copied or used for anypurpose other than for reference only, and SMIC shall not be liable or responsible for any reliance. 认识Mask以及简要的制作流程 TM The Role of Mask in IC Industry DESIGN MASK WAFER TESTING ASSEMBLY How Does Mask Work in Wafer FAB -------Stepper How Does Mask Work in Wafer FAB -------Scanner Raw Material of Mask Blank BIM (binary mask) PSM (phase shift mask) A. KRF-PSM B. ARF-PSM Size of Blank 5inch 90mil(5009) 5inch 180mil(5018) 6inch 120mil(6012) 6inch 250mil(6025) 7inch 250mil(7015) What kind of mask SMIC FABs use? Blank Component Binary Blank PSM Blank Photo Resist(3K,4K,4650A) CrOChrome(~1050A,700A) Quartz Photo Resist(2K,3K,4KA) CrOChrome(1000,~550A) Quartz MoSi Film Photo Resist Opaque Metal Film Substrate Photo Resist Opaque Metal Film Phase Shift Layer Substrate Blank Qz Characteristic Rigidity Heat Expansion(ppm/oC) 615 657 540 Rigidity Quartz Silicon-Boride Sodalite Material 0.5 3.7 9.4 Coefficient Quartz Silicon-Boride Soda lime Material Blank Qz Characteristic Optics Character Transmission ( % ) 200 300 400 0 20 40 60 80 100 Quartz Silicon-Boride Soda Lime Wave Length(nm) That’s why we choose Quartz as the substrate of blank How to Transfer Design to Mask? Writer Process Metrology Vis-Inspect Clean/Mount AIMS Repair 1st Inspect Thr-Inspect STARlight Shipping Develop Strip Etch Front-end Process Blank configuration Photo-resist Cr film Quartz Exposure Photo-resist develop Wet etch Photo-resist strip AEI ASI Re-Etch ? AEI: After Etch CD measure ASI: After Strip CD measure Step1 Step2 Step3 Step4 Step6 Step5 Step7 Front-end Process Dry process Resist Cr Qz H+ H+ H+ H+ H+ H+ H+ EB EB EB H+ H+ H+ H+ H+ H+ H+ Exposure(EB1,EB2,EB3DUV,LB5,LB6) PEB (Post Exposure Bake) SFB2500,APB5500 PAG Acid generation Acid diffusion Deprotection reaction Development(SFD2500,ASP5500) H+ Dry Etch(Gen3,Gen4)AEI, Re-etch Strip, ASI Pel
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