Differential excitation of ports to control chip-mode mediated crosstalk

• US 8,865,537 B2
• Filed: 03/14/2013
• Issued: 10/21/2014
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Abraham, David W., Gambetta, Jay M.
• Primary Examiner(s): Nguyen, Thinh T
• Application Number:
  US13/827,977
• Publication Number:
  US 20140264787A1
• Time in Patent Office: 586 Days
• Field of Search: 257/664, 257/665, 257/30, 257/31, 257/E21.507, 438/637, 438/612, 438/215
• US Class Current: 438/215
• CPC Class Codes: G06N 10/00 Quantum computing, i.e. information processing based on quantum-mechanical phenomena
• CPC Class Codes: H01L 21/568 Temporary substrate used as encapsulation process aid H01L21/4832 and H01L21/566 take precedence
• CPC Class Codes: H01L 2224/0231 Manufacturing methods of the redistribution layers
• CPC Class Codes: H01L 23/564 Details not otherwise provided for, e.g. protection against moisture getters H01L23/26
• CPC Class Codes: H01L 23/66 High-frequency adaptations
• CPC Class Codes: H01L 24/80 Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected

Abstract

A differential port and a method of arranging the differential port are described. The method includes arranging a first electrode to receive a drive signal, and arranging a second electrode to receive a guard signal, the guard signal having a different phase than the drive signal and the first electrode and the second electrode having a gap therebetween. The method also includes disposing a signal line from the first electrode to drive a radio frequency (RF) device.

Claims

1. A method of arranging a differential port in a quantum computing chip, the method comprising:

arranging a first electrode to receive a drive signal;

arranging a second electrode to receive a guard signal, the guard signal having a different phase than the drive signal and the first electrode and the second electrode having a gap therebetween; and

disposing a signal line from the first electrode to drive a radio frequency (RF) device.

2. The method according to claim 1, wherein the arranging the first electrode and the arranging the second electrode include adjusting a relative size and shape of the first electrode and the second electrode.

3. The method according to claim 1, wherein the arranging the first electrode and the arranging the second electrode includes arranging the first electrode and the second electrode to be symmetric when the signal line is not considered.

4. The method according to claim 3, wherein the arranging the first electrode and the arranging the second electrode comprises arranging an inner rectangle within an outer rectangle.

5. The method according to claim 4, wherein the first electrode is the outer rectangle.

6. The method according to claim 3, wherein the arranging the first electrode and the arranging the second electrode comprises arranging an inner oval or circle within an outer oval or circle.

7. The method according to claim 6, wherein the first electrode is as the outer oval or circle.

8. The method according to claim 1, wherein the arranging the first electrode and the arranging the second electrode is based on a chip mode frequency of the quantum computing chip.

9. The method according to claim 1, further comprising selecting a relative phase and amplitude of the drive signal and the guard signal based on the arrangement of the first electrode and the second electrode.