# US 9,521,740 B2 · Electronic device and manufacturing method thereof

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- Number: US 9,521,740 B2
- Document ID: US9521740B2
- Status: Granted
- Kind: B2
- Application number: 14/059,453
- Filed: 2013-10-22
- Published: 2015-04-23
- Granted: 2016-12-13
- Earliest claimed: 2013-10-22
- Assignees: Avermedia Technologies, Inc.
- Applicants: AVerMedia TECHNOLOGIES, INC.
- Inventors: Chien-Ming Yeh; Kuo-Ying Su; Hong-Wei Liu; Jeng-Hau Lin
- Web page: https://patentgrep.com/patent/US9521740B2

## CPC

- H05K 1/0216: {Reduction of cross-talk, noise or electromagnetic interference (grounding H05K1/0215)}
- H05K 9/0022: {of components mounted on printed circuit boards [PCB] (shields integrated within PCB H05K1/0218; shields integrated within component packages H10W42/20)}
- Y10T 29/49002: Electrical device making
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electronic device includes a substrate, a first device, a second device, and a shielding wall. The first device and the second device are disposed on the substrate respectively. The shielding wall is disposed independently between the first device and the second device. The shielding wall is configured for suppressing the electromagnetic interference from the second device to the first device.

## Claims

### Claim 1

A method for manufacturing an electronic device, comprising:
disposing separately a first device and a second device on a substrate, wherein the second device generates an electromagnetic interference;
disposing independently a shielding wall between the first device and the second device, wherein the shielding wall is configured for shielding the electromagnetic interference;
determining a first distance between the first device and the shielding wall and a second distance between the second device and the shielding wall;
obtaining an equivalent height of the shielding wall according to the first distance, the second distance, and a value of the electromagnetic interference from the second device to the first device, wherein the equivalent height of the shielding wall is inversely proportional to a distance of the first distance plus the second distance, and proportional to the value of electromagnetic interference from the second device to the first device; and
determining whether the equivalent height of the electronic device is larger than a threshold height; and
extending an end of the shielding wall horizontally toward the first device to form an extension part above the first device when the equivalent height is larger than the threshold height, wherein a sum of a length of the extension part and the threshold height is substantially equal to the equivalent height.

### Claim 2 (depends on 1)

The manufacturing method as claimed in claim 1, wherein obtaining the equivalent according to the first distance, the second distance, and the value of electromagnetic interference further comprises:
determining an angle of elevation from the first device to the top of the shielding wall according to a relative ratio of the first distance to the second distance and the value of the electromagnetic interference from the second device to the first device when the first distance is different from the second distance; and
obtaining the equivalent height according to the angle of elevation.