SBIR-STTR Award

A Novel Cost-effective Low temperature copper inks for flexible hybrid electronics and conformal antennas
Award last edited on: 7/12/2023

Sponsored Program
SBIR
Awarding Agency
DOD : AF
Total Award Amount
$899,999
Award Phase
2
Solicitation Topic Code
AF181-059
Principal Investigator
Duraiswamy 'ravi' Ravichandran

Company Information

Texas Biochemicals Inc

2151 Harvey Mitchell Parkway South Suite 225
College Station, TX 77840
   (979) 696-7070
   info@texasbiochemicals.com
   www.texabiochemicals.com
Location: Single
Congr. District: 10
County: Brazos

Phase I

Contract Number: FA8650-18-P-5070
Start Date: 7/27/2018    Completed: 7/27/2019
Phase I year
2018
Phase I Amount
$149,999
Recent advances in printed electronics provide solutions that reduce the cost, complexity, and energy requirements of conventional deposition methods. When evaluating production systems and processes, many designers and manufacturers often neglect ink conductivity, customization and cost. Advantageously, nanoparticle-based inks have lower curing temperatures than those typically needed for bulk curing where larger particles of the same material are used. By producing a low-temperature, air-stable copper solution, high performance and lower-cost metallization on substrates such fabric, cellulose, and plastics could be deposited. In Phase-I project, Texas Biochemicals will formulate a stable copper solution that can be deposited in ambient conditions. Our novel material design process creates well dispersed copper nanoparticles homogeneously coated with low-volatile organic molecule protects pure nano metal particles from atmospheric attack and coating enables great particle dispersion in inks, making printing simple. The copper nano inks will be customized to control factors such as substrate compatibility, particle chemistry, and protection from attack by external substances. Collaboration with a leading prime contractor is established to evaluate samples and providetechnical guidance.Their input described under Phase I tasks and the letter of support attached demonstrates their intention to become a commercialization partner leading to near term technology utilization potential.

Phase II

Contract Number: FA8650-19-C-5033
Start Date: 6/27/2019    Completed: 6/27/2021
Phase II year
2019
Phase II Amount
$750,000
Advantageously, nanoparticle-based inks have lower curing temperatures than those typical for bulk curing. A low-temperature and air-stable copper solution enables high performance and lower-cost metallization when deposited on substrates including fabric, cellulose, and plastics. In Phase-I, Texas Biochemicals fulfilled concept goals by developing novel, environmentally-benign and cost-effective copper nano-inks. Results show consistent deposition of copper nano-inks in ambient conditions on two substrates: 1. Polyimide (Kapton) and 2. PET. The screen-printed copper nano-ink line widths 200 μm, 150 μm, 100 μm, 70 μm, 50 μm and 40 μm prove continuous and conductive lines. The post-deposition copper nano-inks heat treated below 120C (compatible with both substrates) while retaining 2.3x107(S/m) high conductivity values. The film morphology illustrates that the copper nano-inks produced via microwave-assisted reactions are dense, spherical copper nano-particles. Phase II will incorporate the copper solution/ink and low-cost manufacturing process into an in-line assembly process, emphasizing roll-to-roll printing. Future processing protocols with low-cost and scalable deposition methods congruent with the electronics manufacturing service (EMS) industry will be enacted. Texas Biochemicals will integrate a package relevant to the Air Force customer featuring small-scale production processes. Collaboration with a leading manufacturer has been established to evaluate samples, provide technical guidance, and support Phase III.