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.
Disclosed is a method for improving adhesion of silica filler particles to an epoxy dielectric matrix. Benefits include improved reliability and improved throughput.
English (United States)
This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
50% of the total text.
Method for improving adhesion of silica filler particles to
an epoxy dielectric matrix
Disclosed is a method for improving adhesion of silica filler
particles to an epoxy dielectric matrix. Benefits
include improved reliability and improved throughput.
� � � � � Silica filler particles present in an epoxy dielectric matrix
tend to contaminate the vias. The contamination cannot be removed by the
desmear and softech procedures conventionally used during preparation of the
vias for plating. Failures of up to 20% of the substrates in reliability
testing have been associated with this issue.
� � � � � Conventionally,
epoxy-terminated trimethoxy silane is used in the process (see Figure 1).
Because it is hydrolyzed, it reacts with the hydroxy termination of the silica
surface. Silane-coated silica is added to the epoxy matrix. The epoxy matrix
contains a hardener (typically amine-terminated chemicals) that reacts with the
epoxy functional groups during curing to create the cross-linking of the
matrix. When the epoxy is cured, the hardener reacts with the epoxy-functional
groups on the silane, anchoring the silica particles to the matrix.
� � � � � With the use of
epoxy-terminated silanes, the epoxy functional group in the silane must compete
with the epoxy-functional groups in the matrix for the hardener. As a result,
the chances are high for the epoxy functional group on the silane to remain
unreacted with the hardener. The silica particles may not be anchored in the
matrix. The m...