Performance of porous capacitor electrodes

Patent metadata

Field	Value
Publication number	US-2019108947-A1
Application number	US-201715728313-A
Country	US
Kind code	A1
Filing date	Oct 9, 2017
Priority date	Oct 9, 2017
Publication date	Apr 11, 2019
Grant date	—

Abstract

Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.

First claim

1 . A capacitor, comprising:
an anode that includes an active layer having both pores and conduits, the conduits being arranged in a periodic two-dimensional pattern.

2 . The capacitor of claim 1 , wherein the periodic two-dimensional pattern is a hexagonal pattern.

3 . The capacitor of claim 1 , wherein an average width of the conduits is more than 2 times an average width of the pores.

4 . The capacitor of claim 1 , wherein the conduits each has a length and the length of the conduits is straight.

5 . The capacitor of claim 1 , wherein the active layer includes particles that each has a dielectric on a core and the pores are located between the particles.

6 . The capacitor of claim 5 , wherein an electrolyte in the conduits is in direct physical contact with the dielectric on different particles.

7 . A capacitor, comprising:
an anode that includes an active layer having both pores and conduits,
the active layer including particles that each has a dielectric on a core with the pores being located between the particles, and
a medium in the conduits being in direct physical contact with the dielectric on different particles.

8 . The capacitor of claim 7 , wherein an average width of the conduits is more than 2 times an average width of the pores.

9 . The capacitor of claim 7 , wherein the conduits each has a length and the length of the conduits is straight.

10 . A capacitor, comprising:
an anode that includes an active layer having both pores and conduits,
the conduits extending from a surface of the active layer into the active layer, and
an average width of the conduits is more than 2 times an average width of the pores.

11 . The capacitor of claim 10 , wherein an average width of the pores is less than 10 μm.

12 . The capacitor of claim 1 , wherein the conduits each has a length and the length of the conduits is straight.

13 . A method of fabricating a capacitor, comprising:
forming conduits in a porous layer of material,
the porous layer of material having particles that each includes a dielectric on a core,
the formation of the conduits causing a portion of the dielectric to convert from a first phase to a second phase; and
removing at least a portion of the second phase of the dielectric from the porous layer of material.

14 . The method of claim 13 , wherein the first phase is boehmite and the second phase is alpha phase corundum oxide.

15 . The method of claim 13 , wherein at least a portion of the converted second phase is located in the conduits.

16 . The method of claim 17 , wherein removing the second phase of the dielectric includes removing the second phase from within the conduits.

17 . The method of claim 16 , wherein removing the second phase from within the conduits includes widening of the conduits.

18 . The method of claim 16 , further comprising: forming the dielectric in an interior of the conduits after removing the second phase from within the conduits.

19 . The method of claim 16 , wherein the dielectric formed in the interior of the conduits is the first phase of the dielectric.

20 . The method of claim 13 , wherein forming the conduits includes laser drilling of the conduits.

Assignees

• Pacesetter Inc

Inventors

• Hemphill Ralph Jason
• Bowen David R
• Strange Thomas F
• Jiang Xiaofei

Classifications

• H01G9/145

  Liquid electrolytic capacitors (H01G11/00 takes precedence) · CPC title

• H01G9/045

  based on aluminium · CPC title

• H01G9/07

  Dielectric layers · CPC title

• H01G9/0029 Primary

  Processes of manufacture · CPC title

• H01G9/048 Primary

  characterised by their structure (H01G11/22 takes precedence) · CPC title