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.
Although this technique is applicable to any insulation material with a conductive under layer, the application here is aimed at optical disk structures.
English (United States)
This text was extracted from a PDF file.
100% of the total text.
Page 1 of 1
Pin Hole Detection
Although this technique is applicable to any insulation material with a
conductive under layer, the application here is aimed at optical disk structures.
An active layer, i.e., TbFe, TbFeCo, etc., is sandwiched between two layers
of dielectric material; such as AIN, Si02, Al203 and Zr02 .
A dilute solution of CuS04 and H20 placed as a droplet on the top dielectric
laser will decorate any pin hole which extends to the active laser. A large ball
(several times the diameter of the defect) will be visible after several seconds
This Cu decoration is a quick and easy method to qualify and quantify