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 a helical rolling-crimping assembly of fins on a copper (Cu) core heatsink. Benefits include improved thermal performance and improved ease of manufacturing.
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
55% of the total text.
Method for a helical rolling-crimping assembly of fins on a
Cu core heatsink
Disclosed is a method for a helical rolling-crimping assembly of
fins on a copper (Cu) core heatsink. Benefits include
improved thermal performance and improved ease of manufacturing.
� � � � � Conventional assembly
of thin fins onto a Cu cylindrical core requires the press fitting or soldering
of uniformly separated, stacked fins. The interface resistance between the Cu
core and these loosely assembled fins reduces the heatsink’s thermal
performance especially for high performance thermal solutions that rely upon
low conduction resistance.
� � � � � The disclosed method
reduces the interface resistance between thin fins and Cu core in tower
heatsinks. A crimped fin approach (i.e. forging of fin into Cu channel) can be
used in a rolling manner with the fin being assembled in a continuous (or
semi-continuous) helical fashion.� The
fin material is rolled and turned to form a helical spring shape with a very
flat profile (see Figure 1).� A billet
of Cu material is turned as a helical channel is cut into the surface (see
Figure 2). After the channel is cut, the fin coils are rotated and directed
into the channel (see Figure 3).� The
fin-feeding step may require some working of the fin material.� Then, a crimping tool collapses the channel
around the fin forming a tight interface.�
A backside traveler may be used to support the force required for forming
the copper during crimpin...