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 set of process steps for fabricating planarized metallic lines of arbitrary thickness to be used as the scan lines in thin film transistor/liquid crystal displays (TFT/LCDs).
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
81% of the total text.
Page 1 of 2
TFT/LCD Damascene Scan Lines
Disclosed is a set of process steps for fabricating planarized metallic lines of
arbitrary thickness to be used as the scan lines in thin film transistor/liquid crystal
The RC time constant for the scan lines of a TFT/LCD array can impose a
serious design constraint. Scan line delay can cause incomplete sampling of the
data intended for cells at the far end of the line being scanned as well as
erroneous sampling of the next line to be scanned. This problem is aggravated
by larger displays (longer display lines), by video rates on the data lines (smaller
error margins for the pulses being driven down the lines), and by gray scale data
(smaller error margins for the charge stored in the cell).
Simply increasing the scan line thickness to reduce the RC time constant
causes insulator step coverage problems in the inverted TFT structures
commonly used. What is needed is a "buried gate" structure with a planar top
surface. Basically this is accomplished by creating a trench to receive the scan
line metal, depositing the metal, and then planarizing it.
The desired scan line pattern is etched into a blanket layer of transparent
insulator deposited on a glass substrate. This etched pattern is then covered by a
thin, deposited layer of metal, such as chrome or tantalum, which acts as an
adhesion layer. This is followed by a layer of scan line metal, such as copper,
some 20% to 30% thicker than the trench depth (Fig. 1). Che...