Method for making electrical contact with an electronic component in the form of a stack, and electronic component having a contact-making structure

Patent metadata

Field	Value
Publication number	US-9691965-B2
Application number	US-201314360982-A
Country	US
Kind code	B2
Filing date	May 8, 2013
Priority date	May 8, 2012
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A method is provided for making electrical contact with an electronic component in the form of a stack formed from a plurality of material layers, which react upon application of an electric field, and a plurality of electrode layers, wherein each material layer is arranged between two of the electrode layers. An insulation structure is generated on at least one stack circumferential region of the stack, which exposes each second electrode layer of the at least one stack circumferential region for electrical contact to be made. Also, a contact-making structure is applied to the at least one stack circumferential region which is provided with the insulation structure. Before the step of generating the contact-making structure, the material layers are partially removed by a material-removing method such that the electrode layers are exposed close to the surface.

First claim

What is claimed is:

1. A method for making electrical contact with an electronic component, the method comprising:
forming a stack including (a) a plurality of material layers that react upon application of an electric field and (b) a plurality of electrode layers having a top, a bottom, and an edge surface, wherein each material layer is arranged between two of the electrode layers;
removing portions of the material layers near an outer surface of the stack using a material-removing method, to expose both the edge surface and a portion of the top and the bottom surfaces of the electrode layers around a perimeter of the stack with a depth defined radially along the exposed portion of the top and the bottom surfaces;
wherein the remaining portions of the material layers have a concave form extending from a first point of contact with a respective first adjacent electrode layer to a second point of contact with a respective second adjacent electrode layer;
forming an insulation structure at the perimeter of the stack, the insulation structure insulating every second electrode layer; and
applying a contact-making structure at the stack circumferential region the contact-making structure making contact with the electrode layers that are not insulated by the insulation structure.

2. The method of claim 1 , wherein the removal of the portions of the material layers is performed before the step of forming the insulation structure.

3. The method of claim 1 , wherein the removal of the portions of the material layers is performed is performed after the step of forming the insulation structure.

4. The method of claim 3 , wherein the removal of the portions of the material layers is performed is performed simultaneous with the exposure of every second electrode layer of the stack circumferential region for making electrical contact.

5. The method of claim 3 , wherein the exposure of every second electrode layer and the removal of the material of the material layers are performed by the same machining method.

6. The method of claim 1 , wherein the removal of the portions of the material layers is performed is performed by at least one of a grinding process, a brushing process, a blasting process, and a laser-based material removal process.

7. The method of claim 1 , comprising:
after the step of forming the insulation structure, applying a thin metal layer to the stack circumferential region by sputtering, and
subsequently applying the contact-making structure to said thin metal layer.

8. An electronic component, comprising:
a stack comprising:
a plurality of electrode layers, each electrode layer having a top, a bottom, and an edge surface; and
a plurality of material layers that react upon application of an electric field, wherein each material layer is arranged between two of the electrode layers;
an insulation structure applied to at least one stack circumferential region of the stack, wherein the insulation layer is formed such that every second electrode layer is exposed for electrical contact near a respective stack circumferential region; and
a contact-making structure applied to the at least one stack circumferential region, the contact-making structure making contact with the exposed electrode;
wherein a portion of each of the material layers of the stack is removed to expose both the edge surface and a portion of the top and the bottom surfaces of the electrode layers around a perimeter of the stack with a depth defined radially along the exposed portion of the top and the bottom surfaces, and replaced by material of the insulation structure or the contact-making structure;
wherein the material layers have a concave form extending from a first point of contact with a respective first adjacent electrode layer to a second point of contact with a respective second adjacent electrode layer.

9. The stack of claim 8 , wherein the exposed depth of each electrode layer has a thickness of no more than 20 μm.

10. The stack of claim 8 , wherein the contact-making structure is formed from a conductive adhesive having a backing made of polyimide, and metal particles embedded therein.

Assignees

• Richter Thomas
• Lenk Andreas
• Zumstrull Claus
• Continental Automotive Gmbh

Inventors

• Richter Thomas
• Lenk Andreas
• Zumstrull Claus

Classifications

• B32B2307/20

  having particular electrical or magnetic properties, e.g. piezoelectric · CPC title

• B32B37/12

  characterised by using adhesives · CPC title

• B32B2310/0875

  using particle radiation · CPC title

• B32B38/0012

  Mechanical treatment, e.g. roughening, deforming, stretching · CPC title

• B32B2310/0843

  using laser · CPC title