Protrusion bump pads for bond-on-trace processing
First Claim
Patent Images
1. A method comprising:
- providing a carrier substrate comprising;
a core; and
a first conductive layer on the core;
forming a first bump pad on the first conductive layer, wherein the first bump pad and the first conductive layer comprise different conductive materials;
forming a first conductive trace, wherein the first conductive trace comprises;
a first portion on the first conductive layer; and
a second portion on the first bump pad;
forming a first dielectric layer on the first conductive layer, the first bump pad, and the first conductive trace;
removing the core; and
removing the first conductive layer using an etching process, wherein the etching process further recesses the first portion of the first conductive trace from a top surface of the first dielectric layer.
1 Assignment
0 Petitions
Accused Products
Abstract
An embodiment apparatus includes a dielectric layer, a conductive trace in the dielectric layer, and a bump pad. The conductive trace includes a first portion having an exposed top surface, wherein the exposed top surface is recessed from a top surface of the dielectric layer. Furthermore, the bump pad is disposed over and is electrically connected to a second portion of the conductive trace.
-
Citations
20 Claims
-
1. A method comprising:
-
providing a carrier substrate comprising; a core; and a first conductive layer on the core; forming a first bump pad on the first conductive layer, wherein the first bump pad and the first conductive layer comprise different conductive materials; forming a first conductive trace, wherein the first conductive trace comprises; a first portion on the first conductive layer; and a second portion on the first bump pad; forming a first dielectric layer on the first conductive layer, the first bump pad, and the first conductive trace; removing the core; and removing the first conductive layer using an etching process, wherein the etching process further recesses the first portion of the first conductive trace from a top surface of the first dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method comprising:
-
providing integrated circuit chip comprising a plurality of conductive bumps; providing an apparatus comprising; a dielectric layer; a plurality of bump pads in the dielectric layer; and a plurality of conductive traces in the dielectric layer, wherein the plurality of conductive traces each comprise; a first portion having an exposed top surface, wherein the exposed top surface is recessed from a top surface of the dielectric layer; and a second portion, wherein at least one of the plurality of bump pads covers the second portion; and bonding the integrated circuit chip to the apparatus by physically coupling the plurality of conductive bumps to the plurality of bump pads. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A method comprising:
-
providing a carrier substrate comprising a core; forming a dielectric layer comprising a first conductive trace and a second conductive trace over the carrier substrate; removing the core; forming a bump pad on the first conductive trace; and recessing a top surface of the second conductive trace below a top surface of the dielectric layer. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification