Patent ID: 6930020
Filing Date: 2005-08-16
Classification: H01L,H05K

Abstract:
1. A method for transferring circuit elements originally supported by an original substrate to locations on a new substrate, said method comprising: providing said original substrate with a release member disposed upon a surface of said original substrate, said circuit elements being fabricated on a top surface of said release member; defining individual elements about said circuit elements, said individual elements having a conical frustum-shaped configuration; fabricating a first set of electrically conductive contacts on a surface of said individual elements, said first set of electrically conductive contacts being concentrically disposed rings defining space therebetween; freeing said conical frustum-shaped individual elements by removing said release member; defining frustum-shaped individual element receptors in said new substrate, said receptors having a bottom surface and sloping side walls, said receptors being sized to receive said conical frustum-shaped individual elements; fabricating a second set of electrically conductive contacts on said bottom surface, said second set of electrically conductive contacts being concentrically disposed rings defining space therebetween, said second set of electrically conductive contacts arranged so as to match said first set of electrically conductive contacts when one of said frustum-shaped individual elements is received in one of said frustum-shaped individual element receptors; applying an electrically conductive substance inside said receptors so as to cover at least the electrically conductive contacts on said bottom surface of said receptors, said electrically conductive substance exhibiting increased conductivity in a direction normal to said bottom of said receptors; raising said new substrate to an incline, with one end of said new substrate being higher than an opposite end of said new substrate; pouring said freed frustum-shaped individual elements onto the higher end of the surface of said new substrate having said receptors and shaking said new substrate so that free frustum-shaped individual elements fall or roll down the inclined new substrate and are received in said receptors whereby said rings of said first set of electrically conductive contacts thereof are brought into conductive contact with corresponding rings of said second set of electrically conductive contacts by the electrically conductive substance inside said receptors; and removing unreceived and/or improperly received frustum-shaped individual elements which have fallen or rolled down to said opposite end of the inclined new substrate from said surface of said new substrate.