Integrated circuit lamination process
First Claim
1. A method for forming a single thin layer integrated circuit device comprising the steps of:
- (1) forming a planar substrate of dissolvable material, the substrate having opposed top and bottom surfaces and side edges;
(2) disposing a protective material layer over the dissolvable material layer, with the protective material layer extending over at least the top surface and the side edges of the dissolvable material layer;
(3) disposing a semiconductive material over the protective material layer on the top surface of the substrate;
(4) forming an integrated circuit in the semiconductive material layer; and
(5) separating the substrate from the protective material layer to form a single thin layer integrated circuit device.
0 Assignments
0 Petitions
Accused Products
Abstract
A process for forming a multi-layer integrated circuit utilizes a rigid substrate covered by a dissolvable material layer, which is in turn coated by a protective material layer. Electrically conductive posts and a semiconductive material layer are then sequentially formed on the protective material layer. An integrated circuit is formed in the top surface of the semiconductive material layer. Upper conductive pads are formed on exposed ends of the conductive posts. The substrate, dissolvable material layer and protective material layer support each thin integrated circuit layer during fabrication and are removed to enable the integrated circuits to be interconnected into a stack via the conductive posts and pads. In another embodiment, the rigid substrate is formed of a dissolvable material layer which is in turn coated by a protective, insulating layer. The conductive posts and integrated circuit are formed on the substrate prior to dissolving the substrate to expose top and bottom pads attached to opposite ends of the conductive posts. The top and bottom pads of a plurality of like integrated circuits are connected to provide interconnection of multiple dies in a stacked arrangement.
-
Citations
15 Claims
-
1. A method for forming a single thin layer integrated circuit device comprising the steps of:
-
(1) forming a planar substrate of dissolvable material, the substrate having opposed top and bottom surfaces and side edges; (2) disposing a protective material layer over the dissolvable material layer, with the protective material layer extending over at least the top surface and the side edges of the dissolvable material layer; (3) disposing a semiconductive material over the protective material layer on the top surface of the substrate; (4) forming an integrated circuit in the semiconductive material layer; and (5) separating the substrate from the protective material layer to form a single thin layer integrated circuit device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for fabricating an integrated circuit device comprising the steps of:
-
(1) forming a dissolvable material layer on a top surface of a planar substrate, the dissolvable material layer terminating in side edges; (2) disposing a protective material layer over the dissolvable material layer, with the side edges of the protective material layer extending over the side edges of the dissolvable material layer; (3) forming at least one electrically conductive post on and extending away from the protective material layer, the electrically conductive post having an exterior surface, top and bottom ends, and a predetermined length; (4) disposing an electrically insulating material layer over the protective material layer and all of the exterior surface of the at least one electrically conductive post; (5) disposing a semiconductor material over the electrically insulating material layer to at least a top end of the electrically conductive post such that a substantially planar top surface is formed exposing the top end of the at least one electrically conductive post; (6) forming an integrated circuit in the top surface of the semiconductive material layer; (7) forming an electrically conductive pad on the top end of the at least one electrically conductive post; (8) separating the substrate, the dissolvable material layer and the protective material layer from the electrically insulating material layer; and (9) electrically connecting the electrically conductive posts and pads of a plurality of like formed integrated circuits in a stack. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
Specification