Patent ID: 6740856
Filing Date: 2004-05-25
Classification: C23C,G03F

Abstract:
A rigid preformed heating member, comprising:a first non-rigid layer of vacuum formable items, comprising a formable film having a conductive layer deposited on one surface of the formable film, said conductive layer being configured for receiving an electrical current and providing a source of heat; and an outer layer disposed over said conductive layer; and a second layer adhered to another surface of the formable film, wherein said second layer provides rigidity to the preformed heating member, said rigid preformed heating member being formed by the method comprising: disposing said vacuum formable items in a mold; vacuum forming said first layer into a configuration corresponding to said mold, said first layer remaining flexible after vacuum forming; and applying said second layer to said first layer via an injection molding process, said second layer provides rigidity to said rigid preformed heating member, wherein said second layer is applied to said first layer after said first layer is formed by vacuum forming.