Patent ID: 6048434
Filing Date: 2000-04-11
Classification: H01L,Y10T

Abstract:
A substrate holding system for holding a substrate in a substrate etching apparatus, wherein said substrate holding system holds said substrate by using electrostatic force, a susceptor made of an electrical insulating member having a top surface approximately at the same level as the treated surface of said substrate and having an inner side surface positioned in adjacent relationship with a surface of said substrate forming the periphery of said substrate, the inner side surface of said susceptor facing the periphery of said substrate in substantially parallel relationship with a direction normal to the treated surface of said substrate, wherein a dielectric thin film made of a brittle material for holding said substrate with electrostatic force is formed on one surface of a holding member, said holding member having a flow passage for circulating a coolant to control the temperature of said substrate, an electrically insulating material member being placed on and in contact with a surface of said holding member, an electrically conductive material member grounded to a standard electric potential being placed on and in contact with a surface of said electrically insulating material member, three kinds of said members being overlaid and fixed to each other in order of the holding member having the dielectric thin film, the electrically insulating material member and the standard electrical potential member, a flow passage penetrating from said standard electric potential member to the coolant flow passage in said holding member for supplying and discharging coolant having a side surface formed of an electrically insulating member, tubes having a side surface made of electrically insulating material forming at least three through holes penetrating said three kinds of members into which movable members linked to a substrate transporting mechanism are inserted, a pipe-shaped member made of an electrically conductive material being attached to said standard electrical potential member to support said three kinds of members, a small diameter pipe-shaped member made of an electrically conductive material being inserted into the inside of said pipe-shaped member and being spaced therefrom through an electrically insulating material, said small diameter pipe-shaped member being connected to said holding member penetrating through said standard electric potential member and said electrically insulating material member, an electric potential for generating an electrostatic force to hold said substrate and a high frequency voltage required for etching said substrate being applied through said small diameter pipe-shaped member, a tube having the side surface made of an electrically insulating material forming a through hole being provided in said holding member and said dielectric thin film so that gas can be supplied from the inside hole of said small diameter pipe-shaped member to the gap between the back surface of said substrate and the surface of said dielectric thin film.