US 11,923,103 B2
Stretchable electronics and methods of making the same
Carmel Majidi, Pittsburgh, PA (US); Chengfeng Pan, Pittsburgh, PA (US); and Kitty Kumar, Vancouver (CA)
Assigned to CARNEGIE MELLON UNIVERSITY, Pittsburgh, PA (US)
Filed by Carnegie Mellon University, Pittsburgh, PA (US)
Filed on Apr. 26, 2021, as Appl. No. 17/240,281.
Application 17/240,281 is a division of application No. 16/750,563, filed on Jan. 23, 2020, granted, now 11,017,915.
Claims priority of provisional application 62/918,263, filed on Jan. 23, 2019.
Prior Publication US 2021/0265074 A1, Aug. 26, 2021
Int. Cl. H05K 1/02 (2006.01); C25D 1/04 (2006.01); C25D 5/02 (2006.01); C25D 5/56 (2006.01); H01B 1/12 (2006.01); H01B 1/22 (2006.01); H05K 1/03 (2006.01); H05K 3/02 (2006.01)
CPC H01B 1/12 (2013.01) [C25D 1/04 (2013.01); C25D 5/022 (2013.01); C25D 5/56 (2013.01); H01B 1/22 (2013.01); H05K 1/0393 (2013.01); H05K 3/027 (2013.01); H05K 2201/0108 (2013.01); H05K 2203/107 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of manufacturing a stretchable and transparent electronic structure comprising a plurality of laser patterned biphasic metallic grid lines having a thickness up to 600 nanometers and a width up to 6 micrometers, the structure comprising a stretchable elastomer layer, a metal alloying layer on top of the stretchable elastomer layer, and a liquid metal, wherein the structure is colorless and transparent when viewed under visible light, the method comprising:
depositing a metal adhesion layer on the stretchable elastomer layer;
depositing the metal alloying layer on the metal adhesion layer; and
alloying the metal alloying layer and the liquid metal to form an electrically conductive material layer; and
laser patterning a pattern of the electrically conductive material layer to form the biphasic metallic grid lines.