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.
This scheme may be used to correct flaws in class artwork for printed circuit boards (PCBs).
English (United States)
This text was extracted from a PDF file.
100% of the total text.
Page 1 of 1
Method for Increasing/Decreasing Line Widths and/or Gaps on Printed
This scheme may be used to correct flaws in class artwork for printed circuit
Clear plastic MYLAR* of varied thickness is used to raise artwork off a
photoresist-covered PCB. With the use of a negative resist, the line width will be
increased with this technique, while the use of a positive resist with this process
will yield line widths which are reduced in size. The areas where the dimensions
are to be modified on the printed circuit are placed in a window cut out of the
MYLAR so that the air gap between the PCB and the artwork will overexpose the
lines to be exposed thereby either reducing or increasing their size depending on
the photoresist used. Trademark of E. I. du Pont de Nemours & Co.