US 12,033,807 B2
Laser drilling of metal foils for assembly in an electrolytic capacitor
Ralph Jason Hemphill, Sunset, SC (US); David R. Bowen, Taylors, SC (US); Kurt J. Erickson, Anderson, SC (US); and Peter Fernstrom, Easley, SC (US)
Assigned to Pacesetter, Inc., Santa Clara, CA (US)
Filed by Pacesetter, Inc., Santa Clara, CA (US)
Filed on Oct. 26, 2021, as Appl. No. 17/511,514.
Application 15/952,469 is a division of application No. 15/153,369, filed on May 12, 2016, granted, now 9,969,030, issued on May 15, 2018.
Application 17/511,514 is a continuation of application No. 15/952,469, filed on Apr. 13, 2018, granted, now 11,185,948.
Prior Publication US 2022/0048140 A1, Feb. 17, 2022
Int. Cl. H01G 9/00 (2006.01); B23K 26/0622 (2014.01); B23K 26/064 (2014.01); B23K 26/067 (2006.01); B23K 26/08 (2014.01); B23K 26/362 (2014.01); B23K 26/382 (2014.01); B23K 26/40 (2014.01); H01G 9/008 (2006.01); H01G 9/02 (2006.01); H01G 9/022 (2006.01); H01G 9/042 (2006.01); H01G 9/045 (2006.01); H01G 9/048 (2006.01); H01G 9/055 (2006.01); H01G 9/08 (2006.01); H01G 11/30 (2013.01); H01G 11/86 (2013.01); B23K 101/16 (2006.01); B23K 101/18 (2006.01); B23K 101/38 (2006.01); B23K 103/10 (2006.01)
CPC H01G 9/0029 (2013.01) [B23K 26/0624 (2015.10); B23K 26/064 (2015.10); B23K 26/0676 (2013.01); B23K 26/083 (2013.01); B23K 26/0838 (2013.01); B23K 26/0846 (2013.01); B23K 26/0876 (2013.01); B23K 26/362 (2013.01); B23K 26/382 (2015.10); B23K 26/40 (2013.01); H01G 9/008 (2013.01); H01G 9/02 (2013.01); H01G 9/022 (2013.01); H01G 9/042 (2013.01); H01G 9/045 (2013.01); H01G 9/048 (2013.01); H01G 9/055 (2013.01); H01G 9/08 (2013.01); H01G 11/30 (2013.01); H01G 11/86 (2013.01); B23K 2101/16 (2018.08); B23K 2101/18 (2018.08); B23K 2101/38 (2018.08); B23K 2103/10 (2018.08)] 19 Claims
OG exemplary drawing
 
1. A method of fabricating an electrolytic capacitor, comprising:
forming first tunnels through a foil so as to define a first tunnel region in the foil,
the first tunnel region having the first tunnels in a first ordered close packed hexagonal array arrangement and the first tunnels each have a first diameter, and
forming second tunnels through the foil with the second tunnels being in a second ordered arrangement,
each of the second tunnels having a second diameter greater than the first diameter, and
the second tunnels being distributed in the first tunnel region such that different portions of the first tunnel region surround each of the second tunnels; and
disposing one or more anodes, one or more cathodes, and one or more separators in a housing with the one or more separators being disposed between an adjacent anode and cathode, at least one of the one or more anodes including the foil.