CAMERA MODULE HAVING MEMS ACTUATOR, CONNECTING METHOD FOR SHUTTER COIL OF CAMERA MODULE AND CAMERA MODULE MANUFACTURED BY THE SAME METHOD

• US 20130057757A1
• Filed: 05/20/2011
• Published: 03/07/2013
• Est. Priority Date: 05/20/2010
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Ryou, Chungsang
• Granted Patent: US 8,970,781 B2
• Time in Patent Office: Days
• US Class Current: 348/374
• CPC Class Codes: B81B 7/0006 Interconnects
• CPC Class Codes: B81B 7/007 Interconnections between the MEMS and external electrical signals
• CPC Class Codes: B81B 7/02 containing distinct electrical or optical devices of particular relevance for their function, e.g. microelectro-mechanical systems [MEMS] B81B7/04 takes precedence
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G03B 2205/0084 using other types of actuators
• CPC Class Codes: G03B 3/10 Power-operated focusing
• CPC Class Codes: G03B 9/08 Shutters
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

Disclosed is a camera module including a substrate which is provided with an electrode pad and an image sensor; a housing which is stacked on the substrate and of which an upper portion is opened so that light is incident to the image sensor; a MEMS actuator which is installed at the housing and has an electrode terminal at one side thereof, and a conductive pattern which is formed at the housing, wherein a lower end of the conductive pattern is connected with the electrode pad of the substrate, and an upper end thereof is connected with the electrode terminal of the MEMS actuator, whereby it is possible to improve electrical reliability between the electrode terminal of the MEMS actuator and the electrode pad of the substrate and facilely form the electrical connection therebetween, thereby reducing the number of processes.

Claims

1. A camera module comprising:

a substrate provided with an electrode pad and an image sensor;

a housing stacked on the substrate and of which an upper portion is opened so that light is incident to the image sensor;

a MEMS actuator installed at the housing and has an electrode terminal at one side thereof, and

a conductive pattern formed at the housing,

wherein a lower end of the conductive pattern is connected with the electrode pad of the substrate, and an upper end thereof is connected with the electrode terminal of the MEMS actuator.

2. The camera module according to claim 1, wherein a lower end of the conductive pattern is exposed through a bottom surface of the housing so as to be connected with the electrode pad of the substrate, and an upper end of the conductive pattern is exposed through an upper surface of the housing so as to be connected with the electrode terminal of the MEMS actuator.

3. The camera module according to claim 1, wherein the electrode pad of the substrate comprises a plurality of positive terminals and negative terminals, and a lower end of the conductive pattern is connected with the plurality of positive terminals and negative terminals.

4. The camera module according to claim 3, wherein the electrode pad is formed at a side surface of the substrate, and opposite terminals has the same polarity.

5. The camera module according to claim 1, wherein the housing comprises a holder which forms a light running space through light is incident to the image sensor, and a lens barrel which is inserted into the light running space of the holder and formed with a hole so as to fix one or more lenses.

6. The camera module according to claim 5, wherein the conductive pattern comprises a first conductive pattern and a second conductive pattern, and the first conductive pattern is formed to be extended from the electrode pad to an inner surface of the light running space of the holder, and the second conductive pattern is formed at an outer surface of the lens barrel so as to be contacted with the first conductive pattern and also to be extended to an upper surface.

7. The camera module according to claim 6, wherein an extended portion is formed at an upper end of the lens barrel so as to be contacted with the electrode terminal of the MEMS actuator, and the second conductive pattern is extended to an upper surface of the extended portion.

8. The camera module according to claim 1, wherein the MEMS actuator is formed with an opening for fixing a moving lens.

9. The camera module according to claim 1, wherein the lower end of the conductive pattern is bonded to the electrode pad by a conductive adhesive.

10. The camera module according to claim 1, wherein the upper end of the conductive pattern is bonded to the MEMS actuator by a conductive adhesive.

11. The camera module according to claim 1, further comprising a shutter which is stacked on the MEMS actuator,

wherein a shutter coil extended from the shutter is welded to an output terminal pad formed at the substrate in order to transfer a control signal of the shutter.

12. The camera module according to claim 11, wherein the shutter coil and the output terminal pad are respectively provided in a pair so as to be corresponding to a positive pole and a negative pole.

13. The camera module according to claim 12, wherein the shutter coil is welded by a welding machine.

14. The camera module according to claim 13, wherein the shutter coil has a diameter of 0.04˜

0.06 mm, and a voltage at a welding tip of the welding machine is 1.2˜

1.4V, and welding time of the welding machine is 5˜

9 ms.