US 12,170,349 B2
Printed structure with electrical contact having reflowable polymer core
Christopher Andrew Bower, Raleigh, NC (US); and Ronald S. Cok, Rochester, NY (US)
Assigned to X Display Company Technology Limited, Dublin (IE)
Filed by X Display Company Technology Limited, Dublin (IE)
Filed on Mar. 24, 2022, as Appl. No. 17/703,100.
Application 17/703,100 is a continuation of application No. 17/006,674, filed on Aug. 28, 2020, granted, now 11,316,086.
Claims priority of provisional application 63/050,732, filed on Jul. 10, 2020.
Prior Publication US 2022/0216386 A1, Jul. 7, 2022
Int. Cl. H01L 33/00 (2010.01); H01L 23/00 (2006.01); H01L 25/075 (2006.01); H01L 33/62 (2010.01); H01L 33/22 (2010.01)
CPC H01L 33/62 (2013.01) [H01L 24/08 (2013.01); H01L 24/32 (2013.01); H01L 24/83 (2013.01); H01L 25/0753 (2013.01); H01L 33/22 (2013.01); H01L 2224/08238 (2013.01); H01L 2224/32225 (2013.01); H01L 2224/80815 (2013.01); H01L 2224/83862 (2013.01); H01L 2933/0066 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A printed structure comprising:
a device comprising device electrical contacts disposed on a common side of the device;
a substrate non-native to the device comprising an electrically separate first substrate electrical contact and second substrate electrical contact disposed on a surface of the substrate, wherein the first substrate electrical contact has a rounded shape and an entire extent of the second substrate electrical contact is substantially planar and is disposed directly on the surface of the substrate,
wherein one of the device electrical contacts is in physical and electrical contact with the rounded shape of the first substrate electrical contact and another of the device electrical contracts is in physical and electrical contact with the second substrate electrical contact,
wherein the first substrate electrical contact comprises a polymer core disposed on the surface of the substrate, wherein the polymer core is (i) a hard-cured rigid reflowed bead having a rounded shape with one or more side walls with a first curve that has a first curvature and a top with a second curve that a has second curvature that is larger than the first curvature and (ii) coated with a contact electrical conductor on a surface of the polymer core, and
wherein an area of the polymer core in contact with the surface of the substrate is a lateral extent of the polymer core over the substrate.