The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
The present work discloses a low cost technique to accomplish a
higher EMI shielding from environmental electromagnetic noise for a cavity
down electronic plastic ball grid array package (PBGA).
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
64% of the total text.
Page 1 of 2
A low cost technique to implement a Faraday cage structure in a cavity down
The present work discloses a low cost technique to accomplish a higher EMI shielding from environmental electromagnetic noise for a cavity down electronic plastic ball grid array package (PBGA). This is achieved by electrically connecting the Copper stiffener, that is part of the package, with the use of a conductive media to the printed circuit laminate section, with the aim of accomplishing a possible integration of a full Faraday's cage that completely surrounds the emitting or receiving device.
As shown on Fig.1 the module configuration presents a Copper stiffener that, as a result of manufacturing process techniques and flows, ends in being attached with an insulating adhesive to the printed circuit board (PCB) laminate section leaving the Copper stiffener electrically floating. In an expanding application space for this packages it becomes important to have this large metal features connected to electrical circuits, generally to a Ground potential, which are present on the PCB section.
C onnecting M odule Ball Grid Array Insulating Adhesive
Fig. 1 Standard Cavity Down Module Configuration
This publication discloses a technique to establish an electrical connection of the Cu stiffener to the GND wiring network present in the laminate section such as protruding Cu segments or lines, pads, or planes present on the surfaces of the laminate and the Cu stiff...