Electrical feedthrough

Patent metadata

Field	Value
Publication number	US-12562514-B2
Application number	US-202217834705-A
Country	US
Kind code	B2
Filing date	Jun 7, 2022
Priority date	Jun 8, 2021
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

An electrical feedthrough includes a base body having a first side and an opposed second side and at least one through-hole extending through the base body from the first side to the second side, an insulating material received in the through-hole, the insulating material having a first surface on the first side of the base body and an opposed second surface on the second side of the base body, and an electrical conductor extending through the insulating material, the electrical conductor having a first diameter at the location of the first surface of the insulating material and a second diameter at the location of the second surface of the insulating material, wherein the first diameter of the electrical conductor is larger than the second diameter of the electrical conductor.

First claim

What is claimed is:

1 . An electrical feedthrough, comprising:
a base body, which is made from a metal material and has a first side and an opposed second side and at least one through-hole extending through the base body from the first side to the second side; an insulating material received in the at least one through-hole, the insulating material having a first surface on the first side of the base body and an opposed second surface on the second side of the base body; and an electrical conductor extending through the insulating material, the electrical conductor having a first diameter at a location of the first surface of the insulating material and a second diameter at a location of the second surface of the insulating material, the first diameter of the electrical conductor being larger than the second diameter of the electrical conductor, the insulating material being configured and arranged to electrically insulate the electrical conductor from the base body, wherein: (i) the electrical conductor (1) ends flush with the first surface of the insulating material on the first side of the base body or (2) is offset from the first surface of the insulating material by less than 500 μm, such that the first surface of the insulating material is grinded flush with the electrical conductor or forms a meniscus which transitions flush to the electrical conductor; and (ii) the electrical conductor protrudes from the second surface of the insulating material on the second side of the base body, the protrusion being more than 500 μm.

2 . The electrical feedthrough according to claim 1 , wherein at least one of:
(i) the electrical conductor has a first section comprising a location of the first diameter and extending from the first surface of the insulating material into the insulating material, wherein the first section of the electrical conductor has a constant diameter; (ii) the electrical conductor has a second section comprising a location of the second diameter and extending from the second surface of the insulating material into the insulating material, wherein the second section of the electrical conductor has a constant diameter; and (iii) the electrical conductor has a tapered section between the location of the first diameter and the location of the second diameter, wherein the tapered section has a tapered diameter and wherein the tapered section is located between the first section and the second section within the insulating material.

3 . The electrical feedthrough according to claim 2 , wherein at least one of:
the electrical conductor has a length L between the location of the first diameter and the location of the second diameter, the length L being in a range of 0.2 mm to 10 mm, in a range of 0.3 mm to 5 mm, or in a range of 1 mm to 3 mm; at least one of (i) the first section of the electrical conductor has a length L 1 and (ii) the tapered section of the electrical conductor has a length L 3 , wherein the length L 1 , the length L 3 , or the length L 1 +the length L 3 is at least 0.1 mm, at least 0.3 mm, or at least 0.6 mm; at least one of (i) the first section of the electrical conductor has a length L 1 and (ii) the tapered section of the electrical conductor has a length L 3 , wherein a ratio of the length L 1 /the length L, a ratio of the length L 3 /the length L, or a ratio of (the length L 1 +the length L 3 )/the length L is smaller than 0.7, is smaller than 0.5, or is smaller than 0.35; wherein the second section of the electrical conductor has a length L 2 , wherein a ratio of the length L 2 /the length L is larger than 0.3, is larger than 0.5, or is larger than 0.65; and the tapered section of the electrical conductor has a length L 3 , wherein a ratio of the length L 3 /the length L 1 is between 1.25 and 3.0, between 1.5 and 2.5, or between 1.75 and 2.25.

4 . The electrical feedthrough according to claim 2 , wherein at least one of:
a ratio of the first diameter to the second diameter of the electrical conductor is between 1.1 and 10, between 1.25 and 3.5, between 1.5 and 3.0, or between 1.75 and 2.75; the first diameter is at least 0.8 mm, at least 1 mm, or at least 1.5 mm; the second diameter is at most 1 mm, at most 0.8 mm, or at most 0.5 mm; the tapered section of the electrical conductor has a diameter tapering from the first diameter to the second diameter; and the tapered section of the electrical conductor has a linearly tapering diameter.

5 . The electrical feedthrough according to claim 2 ,
wherein the electrical conductor comprises a groove for a stronger mechanical interlock with the insulating material, wherein the groove is located in the second section of the electrical conductor.

6 . The electrical feedthrough of claim 1 , wherein the at least one through-hole is at least two through-holes, the base body including the at least two through-holes extending through the base body,
wherein in each of the at least two through-holes a respective one of the insulating material is received, each respective one of the insulating material having a respective one of the first surface on the first side of the base body and a respective one of the opposed second surface on the second side of the base body, and wherein in each of the at least two through-holes a respective one of the electrical conductor extends through each respective one of the insulating material.

7 . The electrical feedthrough according to claim 6 , wherein at least one of:
(i) at least two of the electrical conductor extend through the insulating material or each of the insulating material; (ii) a distance between two of the electrical conductor is less than 50 mm, less than 10 mm, or less than 5 mm; (iii) a distance between two of the electrical conductor is more than 100 μm, more than 150 μm, or more than 200 μm; (iv) a distance between a respective one of the electrical conductor and the base body is less than 5 mm, less than 2 mm, or less than 1 mm; (v) a distance between a respective one of the electrical conductor and the base body is more than 100 μm, more than 150 μm, or more than 200 μm; and (vi) a ratio of a surface area of a respective one of the insulating material received in a respective one of the through-hole and a surface area of a respective one of the electrical conductor or respective ones of the electrical conductor in the respective one of the through-hole on at least one of the first side and the second side of the base body is less than 15, less than 10, less than 5, or less than 4.

8 . The electrical feedthrough according to claim 6 , wherein at least one of:
(i) a respective one of the electrical conductor or each one of the electrical conductor has the first diameter at the location of the first surface of a respective one of the insulating material and the second diameter at the location of the second surface of a respective one of the insulating material; (ii) a respective one of the through-hole has a diameter, which is constant throughout the base body or is tapered, within a range of 2 degrees to 10 degrees, having a maximum diameter; (iii a ratio of the diameter of the respective one of the through-hole/the first diameter of the electrical conductor is at most 1.5, is at most 1.3, is at most 1.2, or is at most 1.11; and (iv) a ratio of the diameter of the respective one of the through-hole/the second diameter of the electrical conductor is at most 10, is at most 5, or is at most 2.5.

9 . The electrical feedthrough according to claim 6 ,
wherein each of the at least two through-holes has a respective diameter, which is constant throughout the base body, and wherein each of the at least two through-holes defines a half-distance diameter, the half-

Assignees

• Schott Ag

Inventors

• Hettler Robert
• Schoen Yvonne
• Kellerer Doris
• Chai Wee Kiat

Classifications

• H01R13/533

  Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure (H01R13/52 takes precedence) · CPC title

• H01B17/30 Primary

  Sealing · CPC title

• H01R13/521

  Sealing between contact members and housing, e.g. sealing insert · CPC title

• H01B17/305

  by embedding in glass or ceramic material · CPC title

• H02G3/22

  Installations of cables or lines through walls, floors or ceilings, e.g. into buildings · CPC title