Scrap wafer regeneration by precise abrasive jet machining with novel composite abrasive for design of experiments

NCUIR > Engineering College > Departmant of Mechanical Engineering > journal & Dissertation > Item 987654321/50261

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50261

Title:	Scrap wafer regeneration by precise abrasive jet machining with novel composite abrasive for design of experiments
Authors:	Ke,JH;Tsai,FC;Hung,JC;Yang,TY;Yan,BH
Contributors:	機械工程學系
Keywords:	RESPONSE-SURFACE METHODOLOGY;SKD61 MOLD STEEL;TAGUCHI METHOD
Date:	2011
Issue Date:	2012-03-27 17:07:57 (UTC+8)
Publisher:	國立中央大學
Abstract:	Great quantities of silicon wafers have been used in the semiconductor industry, resulting in a shortage of raw materials required for wafer production. Unfortunately, conventional wafer regeneration processes still have some issues of machining properties. In this study a precise abrasive jet machining (AJM) method with a novel composite abrasive is employed to reduce the surface roughness of recycled wafers. Experiments designed using the Taguchi method was conducted for removal of patterns from the wafer surface to explore the impact of different processing parameters on surface quality and to optimize the combination of processing parameters. Experimental results show that the optimal parameters for achieving a smooth surface with minimum subsurface damage are composite abrasive coated SiC mesh of # 3000, impact angle of 30, stand-off distance of 70 mm, jet pressure of 0.4 MPa, and platform revolution of 250 r/min. With these parameters, all surface patterns can be removed completely with machining for 5 min. The energy dispersive spectrometer (EDS) results prove that no residual elements exist on silicon wafer and surface roughness is reduced to 0.118 mu m Ra, which contributes to surface improvement and shortens the post-processing time required for silicon wafer regeneration.
Relation:	PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
Appears in Collections:	[Departmant of Mechanical Engineering ] journal & Dissertation

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