By a News Reporter-Staff News Editor at Life Science Weekly — According to news reporting originating from Alexandria, Virginia, by NewsRx journalists, a patent by the inventors Tsai, Chi-Che (Miao-Li County, TW); Wu, Wei-Yen (Miao-Li County, TW); Lin, Po-Ching (Miao-Li County, TW), filed on January 12, 2012, was published online on July 1, 2014 (see also Chimei Innolux Corporation).
The assignee for this patent, patent number 8767164, is Chimei Innolux Corporation (TW).
Reporters obtained the following quote from the background information supplied by the inventors: “The invention relates in general to a thin film transistor substrate, a display apparatus using the same and a manufacturing method thereof, and more particularly to a thin film transistor substrate with a composite plate, a display apparatus using the same and a manufacturing method thereof.
“As the application of display apparatus is getting more and more popular, the research and development in the elements has become one of the prominent tasks for manufacturers. Originally, most display apparatus adopts glass substrate due to its excellent performance in transparency, surface flatness, water/oxygen resistance and dimension stability (that is, low coefficient of thermal expansion). However, glass substrate is not suitable for flexible or impact resistant display apparatus for its poor strength, fragility and poor flexibility. Currently, some display apparatus replace glass substrate with plastic substrate to achieve better performance in toughness, strength, specific weight and flexibility.
“However, plastic substrate cannot achieve the same performance with glass substrate in temperature resistance, chemical resistance, water/oxygen resistance and dimension stability. Particularly, the performance of plastic substrate requires low-temperature or other specific manufacturing ways for passing existing manufacturing specifications. Besides, since water and oxygen are critical to stability and lifespan of electronic elements, poor water/oxygen resistance makes the properties of the product hard to maintain. In addition, the plastic substrate has poor rigidity, the bending level of the plastic substrate hard to meet the operation specifications of existing manufacturing machines even when the thickness is close to glass substrate. Therefore, the plastic substrate must be combined with a rigidity carrier in process. After process finished, the rigidity carrier and the plastic substrate need to be separated, incurring additional materials and costs.
“Some manufacturers try to replace glass substrate with metal foil to provide excellent performance in terms of rigidity, strength, toughness, flexibility, temperature resistance, chemical resistance, water/oxygen resistance and dimension stability. However, metal having large specific weight, metal plate cannot meet the lightweight requirement of display. In order to reduce the weight, after process finished, thin film transistors are covered by a protection layer and the bottom surface of metal plate is etched and thinned to obtain a metal foil. Thus, using metal foil incurs high cost and transistors may be damaged during the etching/thinning process. Thus, find some material to replace glass substrate has become a prominent task for the industries.”
In addition to obtaining background information on this patent, NewsRx editors also obtained the inventors’ summary information for this patent: “The invention is related to a thin film transistor substrate, a display apparatus using the same and a manufacturing method thereof. A composite plate of the display apparatus is used as a substrate for carrying thin film transistors, wherein the composite plate replaces the glass substrate without changing existing manufacturing equipment and specifications, and possesses the advantages of both plastic substrate and metal foil. The display apparatus can be reflective, self-luminous or other non-transmissive type one.
“According to the first aspect of present invention, a thin film transistor substrate is provided. The thin film transistor substrate includes a composite plate and several thin film transistors. The composite plate includes a core material structure and two insulation structures. The core material structure includes a metal layer. The two insulation structures are respectively disposed at two sides of the core material structure so as to sandwich the core material structure therebetween. The thin film transistors are disposed on the composite plate.
“According to the second aspect of present invention, a display apparatus is provided. The display apparatus includes a thin film transistor substrate, a top substrate and a display medium layer. The thin film transistor substrate includes a composite plate and several thin film transistors. The composite plate includes a core material structure and two insulation structures. The core material structure includes a metal layer. The two insulation structures are respectively disposed at two sides of the core material structure so as to sandwich the core material structure therebetween. The thin film transistors are disposed on the composite plate. The display medium layer is disposed between the thin film transistor substrate and the top substrate.
“According to the third aspect of present invention, a manufacturing method of a display apparatus including the following steps is provided. A composite plate including a core material structure and two insulation structures is provided, wherein the core material structure includes a metal layer, and the two insulation structures are respectively disposed at two sides of the core material structure so as to sandwich the core material structure therebetween. Several thin film transistors are formed on the composite plate so as to form a thin film transistor substrate. A top substrate is provided. A display medium layer is formed between the thin film transistor substrate and the top substrate.
“The above and other aspects of the invention will become better understood with regard to the following detailed description of the non-limiting embodiment(s). The following description is made with reference to the accompanying drawings.”
For more information, see this patent: Tsai, Chi-Che; Wu, Wei-Yen; Lin, Po-Ching. Thin Film Transistor Substrate and Display Apparatus Using the Same and Manufacturing Method. U.S. Patent Number 8767164, filed January 12, 2012, and published online on July 1, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8767164.PN.&OS=PN/8767164RS=PN/8767164
Keywords for this news article include: Chalcogens, Chimei Innolux Corporation.
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