TSV formation processes using TSV-last approach
First Claim
Patent Images
1. A device comprising:
- a semiconductor substrate comprising a front surface and a back surface opposite the front surface;
an insulation region extending from the front surface into the semiconductor substrate;
an inter-layer dielectric (ILD) over the insulation region;
a landing pad extending from a top surface of the ILD into the insulation region; and
a through-substrate via (TSV) extending from the back surface of the semiconductor substrate to the landing pad.
1 Assignment
0 Petitions
Accused Products
Abstract
A device includes a semiconductor substrate having a front surface and a back surface opposite the front surface. An insulation region extends from the front surface into the semiconductor substrate. An inter-layer dielectric (ILD) is over the insulation region. A landing pad extends from a top surface of the ILD into the insulation region. A through-substrate via (TSV) extends from the back surface of the semiconductor substrate to the landing pad.
53 Citations
20 Claims
-
1. A device comprising:
-
a semiconductor substrate comprising a front surface and a back surface opposite the front surface; an insulation region extending from the front surface into the semiconductor substrate; an inter-layer dielectric (ILD) over the insulation region; a landing pad extending from a top surface of the ILD into the insulation region; and a through-substrate via (TSV) extending from the back surface of the semiconductor substrate to the landing pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A device comprising:
-
a semiconductor substrate comprising a front surface and a back surface opposite the front surface; a shallow trench isolation (STI) region extending from the front surface into the semiconductor substrate, wherein the STI region comprises a top surface and a bottom surface; an inter-layer dielectric (ILD) over the STI region; a landing pad extending from a top surface of the ILD into the STI region, wherein a bottom surface of the landing pad is vertically between the top surface and the bottom surface of the STI region, and wherein the landing pad is encircled by the STI region; and a through-substrate via (TSV) extending from the back surface of the semiconductor substrate to the landing pad, wherein the TSV penetrates through a lower portion of the STI region to contact the landing pad. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method comprising:
-
providing a semiconductor substrate comprising a front surface and a back surface opposite the front surface; forming an insulation region extending from the front surface into the semiconductor substrate; forming an inter-layer dielectric (ILD) over the insulation region; etching the ILD and the insulation region to form an opening in the ILD and the insulation region; filling the opening with a conductive material to form a landing pad; forming a bottom metal layer over the ILD, wherein the bottom metal layer comprises a metal feature over and electrically coupled to the landing pad; and forming a TSV extending from the back surface of the semiconductor substrate to electrically coupled to the landing pad. - View Dependent Claims (17, 18, 19, 20)
-
Specification