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 article describes a technique for providing a self-leveling substrate contact cap for packaging integrated circuit chips.
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
67% of the total text.
Page 1 of 2
Thermally Enhanced Self Leveling/Positive Contact Substrate Cap
This article describes a technique for providing a self-leveling substrate
contact cap for packaging integrated circuit chips.
In one embodiment shown in Figs. 1 and 2, a self-leveling cap is shown and
designated by the reference character 10. The cap includes a main frame 12
designed to generally close over a substrate 14 having at least one integrated
circuit chip 16 mounted thereon. The cap 10 includes a bellows 18 disposed
inwardly thereof, the bellows being provided with a chip-contacting surface 20. It
is to be understood that there may be a number of bellows, one being provided
for each chip mounted on the substrate.
The bellows has an opening 22 which communicates with the ambient
atmosphere, and disposed within the opening 22 is a fitting 24 which has an
on/off valve 26. The fitting 24 is removably disposed within the opening 22.
Prior to placing the cap over the chip, a vacuum is drawn in each of the
bellows through the fitting 24, and the valve 26 is closed to maintain the vacuum
within the bellows. The cap is placed onto the substrate with the contact surface
20 in contact with the top of the chip 16, while the bellows are maintained at a
vacuum condition. Once the cap 10 has been properly placed with the contact
surface 20 in contact with the chip 16, the valve 26 is opened, releasing the
vacuum and allowing the pressure within the bellows to reach ambient. This
increase from vacuum to a...