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Low Temperature Diffusion Bonding of Semiconductor Devices

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
33607
Program Year/Program:
2010 / SBIR
Agency Tracking Number:
33607
Solicitation Year:
N/A
Solicitation Topic Code:
DARPA 95-c 1
Solicitation Number:
N/A
Small Business Information
SCIENCE RESEARCH LABORATORY INC
15 Ward Street Somerville, MA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2010
Title: Low Temperature Diffusion Bonding of Semiconductor Devices
Agency / Branch: DOD / DARPA
Contract: W31P4Q-10-C-0176
Award Amount: $1,549,769.00
 

Abstract:

Laser diodes (LD) have many desirable properties, e.g. small size and high electrical-to-optical efficiency. For ease of use, most applications require coupling the LD photons to an optical fiber. Attaching the LD-die to a heat-sink is a key packaging procedure. The heat-sink material is generally copper since it is the lowest thermal-resistance metal but its CTE (coefficient of thermal expansion) is significantly larger than the LD-die. Unless compensated, this CTE mismatch leads to mechanical stress which in turn degrades LD performance, lifetime and fiber-coupling efficiency. The use of a malleable-metal solder, consisting of either an indium-based or a lead-based alloy, is the present solution to the CTE mismatch problem between the LD and a copper heat-sink. Unfortunately, indium-alloy solders are subject to thermo-migration and electro-migration whereas lead-alloy solders do not comply with RoHS (Restriction of the Use of Certain Hazardous Substances) regulations. SRL-Ys revolutionary solution to this key technical problem is to use a low-temperature (<125oC) diffusion bond, namely Au-In that has two properties that solve the CTE mismatch: ,r It is applied at temperatures as low as 75oC and; ,r It is simultaneously malleable and stable.

Principal Investigator:

Jonah Jacob
PRINCIPAL INVESTIGATOR
6175471122
JJACOB@SRL.COM

Business Contact:

Jonah Jacob
PRESIDENT
6175471122
JJACOB@SRL.COM
Small Business Information at Submission:

SCIENCE RESEARCH LABORATORY INC
15 WARD STREET SOMERVILLE, MA 02143

EIN/Tax ID: 00006101
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No