US 11,721,648 B2
Signal isolator having at least one isolation island
Robert A. Briano, Auburn, NH (US); and Alejandro Gabriel Milesi, Buenos Aires (AR)
Assigned to Allegro MicroSystems, LLC, Manchester, NH (US)
Filed by Allegro MicroSystems, LLC, Manchester, NH (US)
Filed on Apr. 19, 2022, as Appl. No. 17/659,687.
Application 17/659,687 is a division of application No. 16/430,849, filed on Jun. 4, 2019, granted, now 11,342,288.
Prior Publication US 2022/0238461 A1, Jul. 28, 2022
Int. Cl. H01L 23/64 (2006.01); H01L 23/552 (2006.01); H01L 23/66 (2006.01); H03H 7/00 (2006.01); H04L 25/02 (2006.01)
CPC H01L 23/642 (2013.01) [H01L 23/552 (2013.01); H01L 23/66 (2013.01); H03H 7/004 (2013.01); H04L 25/0266 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for providing a signal isolator, comprising:
electrically connecting a first die portion to a first metal region;
isolating a second die portion from the first die portion;
electrically connection a second metal region to the second die portion;
electrically isolating a third metal region from the first and second metal regions;
electrically isolating a third die portion from the first, second and third metal regions,
wherein the first metal region, the second metal region, and the third metal region provide a first isolated signal path from the first die portion to the second die portion; and
wherein the first metal region, the second metal region and the third die portion provide a second isolated signal path from the first die portion to the second die portion in parallel with the first isolated signal path.