Thin film electrical component
First Claim
1. A thin film electrical component comprisinga rigid glass carrier plate,a substrate bonded to the rigid glass carrier plate, the substrate comprising a polymer establishing a bond with the rigid glass carrier plate that is broken upon immersion of the substrate and the rigid glass carrier plate in one of a hot water bath and a warm temperature physiologic saline bath to release the polymer from attachment to the rigid glass carrier plate, andmeans for providing an electrical circuit, the providing means being bonded to the substrate and undisrupted during release of the substrate from attachment to the rigid glass carrier plate.
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Accused Products
Abstract
A biocompatible thin film electrical component is configured for use in a human body or other ionic liquid environment. A polyimide substrate is bonded to a glass carrier plate sized for handling by automatic equipment and a multiple-layer metal conductor is deposited on the substrate and patterned to define an electrical circuit or biosensor. The polyimide and the glass establish a bond therebetween that withstands handling yet is know using biocompatible releasing agents and techniques. The polyimide substrate and glass carrier plate preferably have similar thermal expansion properties to reduce the likelihood of fracture and delamination problems during release of the substrate from the carrier plate. An insulation layer covers the metal conductor and, in one embodiment, is made of polyimide having a cure temperature lower than the temperature at which interediffusion occurrs in the metal layers in the conductor.
891 Citations
19 Claims
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1. A thin film electrical component comprising
a rigid glass carrier plate, a substrate bonded to the rigid glass carrier plate, the substrate comprising a polymer establishing a bond with the rigid glass carrier plate that is broken upon immersion of the substrate and the rigid glass carrier plate in one of a hot water bath and a warm temperature physiologic saline bath to release the polymer from attachment to the rigid glass carrier plate, and means for providing an electrical circuit, the providing means being bonded to the substrate and undisrupted during release of the substrate from attachment to the rigid glass carrier plate.
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9. A thin film electrical component comprising
a polymer substrate, a first adhesive metal layer bonded to the polymer substrate, a noble metal layer bonded to the first adhesive metal layer, a second adhesive metal layer bonded to the noble metal layer, the noble metal layer being sandwiched between the first and second adhesive metal layers, and a polymer insulator bonded at least to the first and second adhesive metal layers to cover all exposed surfaces of the first and second adhesive metal layers unbonded to one of the polymer substrate and the noble metal layer.
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19. An apparatus for preparing a thin film electrical component comprising
a rigid glass carrier plate, and a substrate bonded to the rigid glass carrier plate, the substrate comprising a polymer establishing a bond with the rigid glass carrier plate that is broken upon immersion of the substrate and the rigid glass carrier plate in one of a hot water bath and a warm temperature physiologic saline bath to release the polymer from attachment to the rigid glass carrier plate.
Specification