Camera module and method for the production thereof

Patent metadata

Field	Value
Publication number	US-2016014313-A1
Application number	US-201414769941-A
Country	US
Kind code	A1
Filing date	Feb 11, 2014
Priority date	Mar 19, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

A camera module including an objective lens housing with an optical system, an image sensor chip with wire bonding connections, and a printed circuit board for contacting the image sensor chip. The printed circuit board is designed with wire bonding areas to which the wire bonding connections of the image sensor chip are connected, and the assembly made up of the image sensor chip and the printed circuit board is designed in such a manner that the image sensor chip is focus-adjusted to the optical system by changing its position relative to the printed circuit board taking advantage of the flexibility of the wire bonding connections of the image sensor chip. The invention further relates to a method of manufacturing the camera module.

First claim

1 . A camera module comprising:
an objective lens housing with an optical system, an image sensor chip with wire bonding connections, and a printed circuit board for contacting the image sensor chip, wherein the printed circuit board has wire bonding areas to which the wire bonding connections of the image sensor chip are connected, and the assembly made up of the image sensor chip and the printed circuit board is designed in such a manner that the image sensor chip is focus-adjusted to the optical system by changing its position relative to the printed circuit board taking advantage of the flexibility of the wire bonding connections of the image sensor chip, wherein the image sensor chip is arranged on a chip support and the chip support, together with the image sensor chip, is focus-adjusted to the optical system by changing its position relative to the printed circuit board, and wherein a support plate is provided, which has a recess adapted to a contour of the chip support and is arranged on the printed circuit board while the chip support is received within the recess.

2 . (canceled)

3 . (canceled)

4 . The camera module according to claim 1 , wherein the printed circuit board has at least one access opening in the region of the chip support through which the chip support is accessible in order to be moved to focus it on the optical system.

5 . The camera module according to claim 4 , wherein the chip support is connected to micromechanical components through the access opening, so that the focus is adjusted during operation of the camera module by activating a focusing feature.

6 . A camera module comprising:
an objective lens housing with an optical system, an image sensor chip with wire bonding connections, and a printed circuit board for contacting the image sensor chip, wherein the printed circuit board has wire bonding areas to which the wire bonding connections of the image sensor chip are connected, and the assembly made up of the image sensor chip and the printed circuit board is designed in such a manner that the image sensor chip is focus-adjusted to the optical system by changing its position relative to the printed circuit board taking advantage of the flexibility of the wire bonding connections of the image sensor chip, wherein a support plate is provided which has a recess adapted to a contour of the chip support, the printed circuit board has a receiving opening adapted to a contour of the image sensor chip and is arranged on the support plate, the receiving opening and the recess being centered to each other, and the chip support is arranged in the recess of the support plate while the image sensor chip is received in the receiving opening.

7 . The camera module according to claim 1 , wherein the chip support is fixed in place relative to the support plate and/or the printed circuit board by a fixing means in order to focus-adjust the image sensor chip to the optical system.

8 . The camera module according to claim 7 , wherein the fixing means is an adhesive connection which connects the chip support at least with the support plate and/or the printed circuit board.

9 . The camera module according to claim 7 , wherein the fixing means comprising at least one bridge which is plastically deformed and connects the chip support with the support plate.

10 . The camera module according to claim 8 , wherein the chip support has a circular contour, and three bridges distributed along the circular contour which are plastically deformed and make up the connection to the support plate are provided as fixing means.

11 . A method of manufacturing the camera module according to claim 1 , the method comprising:
Contacting the wire bonding connections with the wire bonding areas of the printed circuit board, Focus-adjusting the image sensor chip to the optical system by moving the image sensor chip relative to the printed circuit board taking advantage of the flexibility of the wire bonding connections of the image sensor chip and Fixing in place the adjusted image sensor chip relative to the printed circuit board.

12 . A method of manufacturing the camera module according to claim 10 , comprising:
Contacting the wire bonding connections with the wire bonding areas of the printed circuit board, Focus-adjusting the image sensor chip to the optical system by moving the image sensor chip relative to the printed circuit board taking advantage of the flexibility of the wire bonding connections of the image sensor chip, Fixing in place the adjusted image sensor chip relative to the printed circuit board, Forming the printed circuit board on which the chip support and the support plate are mounted, and contacting the wire bonding connections with the wire bonding areas of the printed circuit board, Forming an objective lens housing with an optical system, Connecting the objective lens housing to the support plate in a force-based, shape-based or material-based manner, Adjusting the chip support by moving it along the optical axis of the optical system using adjustment means, and Fixing in place the adjusted chip support using a fixing means.

13 . A method of manufacturing the camera module according to claim 10 , comprising:
Forming the assembly made up of the support plate and the printed circuit board arranged thereon, the receiving opening and the recess being centered to each other, Forming an objective lens housing with an optical system, Connecting the objective lens housing to the support plate in a force-based, shape-based or material-based manner, Forming the chip support with the image sensor chip, Adjusting the chip support by moving it along the optical axis of the optical system using adjustment means, and Fixing in place the adjusted chip support using a fixing means.

14 . The method according to claim 11 , wherein the fixing means is an adhesive connection which is introduced between the chip support and the support plate and/or the printed circuit board.

15 . The method according to claim 12 , wherein gripping means which extend through access openings in the printed circuit board and serve to grip the chip support are used as adjustment means.

16 . A method of manufacturing a camera module according to claim 10 , comprising:
Forming the support plate with a chip support connected thereto by at least one bridge, Mounting the support plate on the printed circuit board, and contacting the wire bonding connections with the wire bonding areas of the printed circuit board, Forming an objective lens housing with an optical system, Connecting the objective lens housing to the support plate in a force-based or shape-based manner, and Adjusting and fixing in place the chip support by plastically deforming the at least one bridge.

17 . The method according to claim 15 , wherein the at least one bridge is plastically deformed by exerting a force on the chip support adjacent to the bridge.

18 . The method according to claim 16 , wherein, the at least one bridge is plastically deformed by supplying energy into the at least one bridge.

19 . The method according to claim 15 , wherein the adjusting and the fixing comprise:
Measuring the current focus position by a focusable collimator to determine a sharpness curve, Using the sharpness curve to determine a correction value for the plastic bending of the at least one bridge in order to achieve an optimum focus position, and Adjusting to the optimum focus position according to the determined correction value

Assignees

• Conti Temic Microelectronic

Inventors

• Müller Gerhard
• Krökel Dieter

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/57 Primary

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/54 Primary

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N5/2253

  Electricity · mapped topic

• H04N5/2254

  Electricity · mapped topic