Electrical feedthrough

Abstract

To provide an electrical feedthrough allowing electrical conductors to be arranged in high density, while at the same time sealing properties, such as electrical insulation, hermeticity, and long-term reliability are optimized.SOLUTION: The present invention relates to an electrical feedthrough 10. The electrical feedthrough 10 includes: a base body 20 having a first side 22 and an opposed second side 24 and at least one through-hole extending through the base body from the first side 22 to the second side 24; an insulating material 30 received in the through-hole, the insulating material having a first surface on the first side 22 of the base body 20 and an opposed second surface on the second side 24 of the base body; and an electrical conductor 40 extending through the insulating material 30 and having a first diameter DEC1 at the location of the first surface 22 of the insulating material 30 and a second diameter DEC2 at the location of the second surface 24 of the insulating material 30, the first diameter DEC1 of the electrical conductor 40 being larger than the second diameter DEC2 of the electrical conductor 40.SELECTED DRAWING: Figure 4

Claims

1. An electrical feedthrough (10) having a substrate (20), an insulating material (30), and an electrical conductor (40), The substrate (20) has a first side (22), an opposing second side (24), and at least one through hole (26) extending therethrough from the first side (22) to the second side (24); the insulating material (30) is contained within the at least one through hole (26) and has a first surface (32) on the first side (22) of the substrate (20) and an opposing second surface (34) on the second side (24) of the substrate (20); The electrical conductor (40) extends through the insulating material (30) and has a first diameter (DEC1) at the first surface (32) of the insulating material (30) and a second diameter (DEC2) at the second surface (34) of the insulating material (30); The first diameter (DEC1) of the electrical conductor (40) is greater than the second diameter (DEC2) of the electrical conductor (40). An electrical feedthrough (10).

2. the electrical conductor (40) terminates flush with the first surface (32) of the insulating material (30) on the first side (22) of the substrate (20) or is offset from the insulating material (30) by less than 500 μm, preferably less than 250 μm, particularly preferably less than 100 μm, whereby in particular the first surface (32) of the insulating material (30) is ground flush with the electrical conductor (40) or forms a meniscus that transitions, preferably flush with the electrical conductor (40); and / or the electrical conductor (40) protrudes from the second surface (34) of the insulating material (30) on the second side (24) of the substrate (20), the protrusion preferably being greater than 500 μm, particularly preferably greater than 1 mm; The electrical feedthrough (10) of claim 1.

3. the electrical conductor (40) has a first section (42) that includes the location of the first diameter (DEC1) and extends from the first surface (32) of the insulating material (30) into the insulating material (30), the first section (42) of the electrical conductor (40) preferably having a constant diameter; and / or the electrical conductor (40) has a second section (44) that includes the location of the second diameter (DEC2) and extends from the second surface (34) of the insulating material (30) into the insulating material (30), the second section (44) of the electrical conductor (40) preferably having a constant diameter; and / or the electrical conductor (40) has a tapered section (46) between the first diameter (DEC1) and the second diameter (DEC2), the tapered section having a tapered diameter, the tapered section (46) being preferably disposed within the insulating material (30) between the first section (42) and the second section (44); The electrical feedthrough (10) of claim 1.

4. the electrical conductor (40) has a length (L) between the position of the first diameter (DEC1) and the position of the second diameter (DEC2), the length (L) being preferably in the range of 0.2 mm to 10 mm, particularly preferably in the range of 0.3 mm to 5 mm, and even more preferably in the range of 1 mm to 3 mm; and / or the first section (42) of the electrical conductor (40) has a length (L1) and / or the tapered section (46) of the electrical conductor (40) has a length (L3), and the length L1, the length L3 or the length L1 + the length L3 is at least 0.1 mm, preferably at least 0.3 mm, particularly preferably at least 0.6 mm; and / or the first section (42) of the electrical conductor (40) has a length (L1) and / or the tapered section (46) of the electrical conductor (40) has a length (L3), the ratio L1 / L, the ratio L3 / L or the ratio (L1+L3) / L being smaller than 0.7, preferably smaller than 0.5, particularly preferably smaller than 0.35; and / or the second section (44) of the electrical conductor (40) has a length (L2), the ratio L2 / L being greater than 0.3, preferably greater than 0.5, particularly preferably greater than 0.65; and / or the tapered section (46) of the electrical conductor (40) has a length (L3), the ratio L3 / L1 being between 1.25 and 3.0, preferably between 1.5 and 2.5, and particularly preferably between 1.75 and 2.25; The electrical feedthrough (10) of claim 3.

5. the ratio DEC1 / DEC2 of the first diameter (DEC1) to the second diameter (DEC2) of the electrical conductor (40) is between 1.1 and 10, preferably between 1.25 and 3.5, more preferably between 1.5 and 3.0, particularly preferably between 1.75 and 2.75; and / or said first diameter DEC1 being at least 0.8 mm, preferably at least 1 mm, particularly preferably at least 1.5 mm; and / or the second diameter DEC2 is at most 1 mm, preferably at most 0.8 mm, particularly preferably at most 0.5 mm, and / or the tapered section (46) of the electrical conductor (40) has a diameter that tapers from DEC1 to DEC2; and / or The tapered section (46) of the electrical conductor (40) has a linearly tapered diameter. The electrical feedthrough (10) of claim 3.

6. The electrical conductor (40) has grooves (48) for a stronger mechanical bond with the insulating material (30); The groove (48) is preferably disposed in the second section (44) of the electrical conductor (40). The electrical feedthrough (10) of claim 3.

7. The electrical feedthrough (10) includes a substrate (20) having at least two through holes (26) extending therethrough, the substrate having a first side (22) and an opposing second side (24); an insulating material (30) is contained in each of the at least two through holes (26), each insulating material (30) having a first surface (32) on the first side (22) of the substrate (20) and an opposing second surface (34) on the second side (24) of the substrate (20); Within each of the at least two through holes (26), an electrical conductor (40) extends through each of the insulating materials (30); The electrical feedthrough (10) of claim 1.

8. At least two electrical conductors (40) extend through the or each insulating material (30); and / or the distance (ΔΕC) between the two electrical conductors (40) is less than 50 mm, preferably less than 10 mm, particularly preferably less than 5 mm, and / or the distance (ΔΕC) between the two electrical conductors (40) is greater than 100 μm, preferably greater than 150 μm, particularly preferably greater than 200 μm, and / or the distance (ΔΕCBB) between one electrical conductor (40) and the substrate (20) is less than 5 mm, preferably less than 2 mm, particularly preferably less than 1 mm, and / or the distance (ΔΕCBB) between one electrical conductor (40) and the substrate (20) is greater than 100 μm, preferably greater than 150 μm, particularly preferably greater than 200 μm, and / or the ratio of the surface area of ​​the insulating material (30) accommodated in one through-hole (26) to the surface area of ​​the electrical conductor (40) in each through-hole (26) on at least one side of the base (20) is less than 15, preferably less than 10, particularly preferably less than 5 or less than 4; The electrical feedthrough (10) of claim 1.

9. The or each electrical conductor (40) has a first diameter (DEC1, DEC1') at the first surface (32) of each insulating material (30) and a second diameter (DEC2, DEC2') at the second surface (34) of each insulating material (30); and the or each through hole (26) has a diameter (DTH, DTH'), said diameter (DTH, DTH') being preferably constant throughout said substrate (20) or preferably tapering to a maximum diameter (DTH, DTH') within a range of 2° to 10°; and the ratio DTH / DEC1 of at least one through hole is at most 1.5, preferably at most 1.3, particularly preferably at most 1.2 or at most 1.11; and / or The ratio DTH / DEC2 of at least one through hole is at most 10, preferably at most 5, particularly preferably at most 2.5; The electrical feedthrough (10) of claim 1.

10. Each of the at least two through holes (26) preferably has a constant diameter (DTH) throughout the substrate (20); and each of the at least two through holes (26) defining a half-spacing diameter (DBB), the half-spacing diameter (DBB) being the spacing (ΔΤH) in the base (20) between adjacent through holes (26) plus the diameter (DTH) of each of the through holes (26); the ratio DBB / DTH of at least one through hole is less than 2.0, preferably less than 1.8, particularly preferably less than 1.7, or less than 1.6, or less than 1.5, or less than 1.4, or less than 1.3, or less than 1.2, or less than 1.1; The electrical feedthrough (10) of claim 7.

11. the insulating material (30) is under a contact pressure (CP2) at the location of the second surface (34) of the second side (24) of the substrate (20), CP2 being a positive contact pressure or CP2 being a negative contact pressure having an absolute value of less than 30 MPa, preferably less than 20 MPa, particularly preferably less than 10 MPa or less than 5 MPa; and / or the insulating material (30) is under a contact pressure (CP1) at the location of the first surface (32) of the first side (22) of the substrate (20), CP1 being a negative contact pressure having an absolute value of more than 1 MPa, preferably more than 5 MPa, particularly preferably more than 10 MPa; The electrical feedthrough (10) of claim 1.

12. The insulating material (30) is under a maximum positive contact pressure (CP3) having an absolute value of less than 155 MPa, preferably less than 70 MPa, more preferably less than 50 MPa, more preferably less than 40 MPa, and particularly preferably less than 20 MPa. The electrical feedthrough (10) of claim 1.

13. The substrate (20) is 5×10 －６ K －１ ~25 x 10 －６ K －１ , preferably 5×10 －６ K －１ ~20 x 10 －６ K －１ and / or The insulating material (30) is 3×10 －６ K －１ ~15 x 10 －６ K －１ , preferably 5×10 －６ K －１ ~12×10 －６ K －１ and / or The electrical conductor (40) is 3×10 －６ K －１ ~25 x 10 －６ K －１ , preferably 5×10 －６ K －１ ~20 x 10 －６ K －１ and / or The substrate (20) comprises at least one of the following materials: metal, austenitic stainless steel, in particular of the AISI 300 series, ferritic stainless steel, in particular of the AISI 400 series, titanium, Inconel, duplex stainless steel, niobium, an alloy of one of the aforementioned metals, for example a titanium alloy, a ceramic, and / or The insulating material (30) comprises at least one of the following materials: glass, glass-ceramic, ceramic; and / or The electrical conductor (40) comprises at least one of the following materials: metal, metal alloy, stainless steel 300 series, stainless steel 400 series, titanium, NiFe, NiFeCo alloy, niobium, copper, tungsten, molybdenum, platinum, an alloy of one of the above mentioned metals, such as a titanium alloy or a copper alloy. The electrical feedthrough (10) of claim 1.

14. the substrate (20) and the electrical conductor (40) comprise only non-allergenic materials; The substrate (20) and the electrical conductor (40) preferably do not leach nickel; The electrical feedthrough (10) of claim 1.

15. Charging port or medical port for an electronic device, in particular a wearable, comprising an electrical feedthrough (10) according to any one of the preceding claims.

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