Unlock instant, AI-driven research and patent intelligence for your innovation.
Polyimide laminate and method for producing same
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of polyimide layer and polyimide, applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve the warping of laminated bodies, insufficient suppression effect, and inability to miniaturize the display part, etc. problem, to achieve the effect of suppressing warpage and good precision
Active Publication Date: 2018-06-08
NIPPON STEEL CHEM &MATERIAL CO LTD
View PDF7 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
At this time, the coefficient of thermal expansion relative to the glass substrate is several ppm / K, and the resin generally has a coefficient of thermal expansion of several tens of ppm / K or more, so there is a possibility that the laminate may warp and miniaturization of the display part may not be possible.
[0011] In this regard, Patent Document 3 discloses that a resin layer (b) having a coefficient of thermal expansion between the support substrate and the resin film (a) is provided between the support substrate and the resin film (a), but the effect of suppressing warpage is not sufficient. insufficient
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0083] Hereinafter, the present invention will be specifically described based on Examples and Comparative Examples. Furthermore, the present invention is not limited by these contents.
[0084] First, the meaning of the abbreviation used below, the evaluation method of the physical property etc. in an Example etc. are shown.
[0094] The light transmittance at 500 nm was calculated|required with respect to a polyimide film (50mmx50mm) using the U4000 type|mold spectrophotometer.
[0095] 〔Coefficient of thermal expansion (CTE)〕
[009...
Synthetic example 1
[0112] Under nitrogen flow, TFMB: 8.49 g was dissolved in 85 g of GBL as a solvent while stirring in a 100 ml separable flask. Next, PMDA: 5.04 g was added to this solution. After 10 minutes the anhydride 6FDA: 1.47 g was added. The molar ratio of acid anhydride and diamine was set to 0.998. Afterwards, the solution was continuously stirred at room temperature for 4 hours and polymerized for one day and night. Then, a viscous colorless polyamic acid solution was obtained, and production of polyamic acid A with a high degree of polymerization was confirmed.
Synthetic example 2
[0113] Synthesis Example 2 to Synthesis Example 7
[0114]Except having changed acid anhydride and diamine into the mass composition shown in Table 1, it carried out similarly to the synthesis example 1, and prepared the polyamic-acid solution, and obtained polyamic-acid (resin) B - polyamic-acid (resin) G.
[0115] [Table 1]
[0116] Weight (g)
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
thickness
aaaaa
aaaaa
thickness
aaaaa
aaaaa
peel strength
aaaaa
aaaaa
Login to View More
Abstract
Provided are a polyimide laminate with which warping is suppressed and with which it is possible to easily and conveniently separate a resin base material, and a method for producing same. Provided isa laminate provided with a plurality of polyimidelayers of, in sequence, a first polyimide layer and a second polyimide layer on a support body having a thermal expansion coefficient of 1-10 ppm / K,said polyimide laminate being characterized in that: the first polyimide layer has a film thickness of 1-50 [mu]m, a thermal expansion coefficient that is at least the thermal expansion coefficient ofthe support body and is 5-30 [mu]m, and a glass transition temperature of at least 300 DEG C; that the second polyimide layer has a film thickness of 5-30 [mu]m and a thermal expansion coefficient that is at least the thermal expansion coefficient of the first polyimide layer; and that the first polyimide layer and the second polyimide layer can be peeled at the interface thereof. Further provided is a method for producing the polyimide laminate in which a resin solution of a polyimide or a polyimide precursor is sequentially applied, dried, and heat-treated to form each of the polyimide layers.
Description
technical field [0001] The present invention relates to a polyimide laminate formed by laminating a first polyimide layer and a second polyimide layer on a support and a method for manufacturing the same. A polyimide laminate including a second polyimide layer and having a display section provided on a flexible resin substrate, and a method for producing the same. Background technique [0002] Display devices such as liquid crystal display devices or organic electroluminescence (EL) display devices are widely used in large displays such as televisions to small displays such as mobile phones, personal computers, and smart phones. For example, in an organic EL display device, a thin film transistor (Thin Film Transistor, TFT) is formed on a glass substrate, and an electrode, a light-emitting layer, an electrode, etc. are sequentially formed, and finally a glass substrate or a multi-layer thin film is used for hermetic sealing. production. [0003] Here, the type of display d...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More