Patent ID: 8747625

Claim:
A grinding/electrolysis combined multi-wire-slicing processing method for silicon wafers, comprising: firstly, a metal slicing wire on a multi-wire slicing machine tool is used as a tool electrode configured as a cathode and a silicon rod or silicon ingot configured as an anode is subject to grinding/electrolysis combined slicing processing by a dedicated power input method; secondly, the metal slicing wire and the silicon rod or silicon ingot are externally connected to a low-voltage continuous or impulse DC power supply during the processing; thirdly, cutting fluid is sprayed in the slicing zone in order to meet the requirements of slurry supply or cooling, product removal and anode passivation or corrosion; said dedicated power input method comprises: a metal electrode ( 3 ) is added between the silicon rod or silicon ingot ( 1 ) and glass ( 2 ), binder ( 4 ) is used to bind the silicon rod or silicon ingot ( 1 ) and glass ( 2 ) together and realize good conductivity between the silicon rod or silicon ingot ( 1 ) and the metal electrode ( 3 ), glass ( 2 ) is mounted onto a metal layer ( 5 ) through which glass ( 2 ) is positioned and mounted to a workbench ( 6 ) in a fixed manner, an electrical insulation with a machine tool body ( 7 ) is maintained, a lead-out part of metal electrode ( 3 ) is connected to an anode of the low-voltage continuous or impulse DC power supply ( 9 ) with a cable ( 8 ), thereby realizing a connection between the silicon rod or silicon ingot ( 1 ) and the anode of low-voltage continuous or impulse DC power supply ( 9 ), a metal slicing wire ( 10 ) passes through a main wire roller ( 11 ), and a power input block ( 12 ) is connected to a cathode of low-voltage continuous or impulse DC power supply ( 9 ); wherein the workbench ( 6 ) laterally protrudes beyond the edges of the metal layer ( 5 ); and wherein the machine tool body ( 7 ) laterally protrudes beyond the edges of the workbench ( 6 ).