Laminated plate, circuit board and liquid crystal polymer film used for laminated plate and circuit board

A liquid crystal polymer, laminate technology, applied in the direction of liquid crystal materials, metal adhesion improvement of insulating substrates, coatings, etc., can solve the problems of electronic product deterioration, signal loss, electronic product quality and performance deterioration, etc.

Pending Publication Date: 2021-07-09
CHANG CHUN PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the size of the components of electronic products is smaller, the problem of moisture absorption on the circuit board becomes more and more serious, resulting in the quality and performance of electronic products being easily affected by traces of moisture and degraded during the manufacturing or use process.
On the other hand, for some outdoor electronic products, they may need to be exposed to harsh environments (such as high humidity environments) for a long time in use, which also makes the quality and performance of electronic products easily affected by moisture being degraded
The above situations make the problem of signal loss in electronic products after moisture absorption become more and more serious, and it is impossible to exert excellent signal transmission capabilities in low-frequency, medium-frequency, and high-frequency bands as expected

Method used

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  • Laminated plate, circuit board and liquid crystal polymer film used for laminated plate and circuit board
  • Laminated plate, circuit board and liquid crystal polymer film used for laminated plate and circuit board
  • Laminated plate, circuit board and liquid crystal polymer film used for laminated plate and circuit board

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0048] Preparation Example 1: Liquid Crystal Polymer Resin

[0049] In a 3-liter autoclave, 540 grams of 6-hydroxy-2-naphthoic acid, 1071 grams of 4-hydroxybenzoic acid, 1086 grams of acetic anhydride, 1.3 grams of sodium phosphite and 0.3 grams of 1-methylimidazole (1-methylimidazole) is mixed, and it is subjected to acetylation reaction for about 2 hours in a nitrogen atmosphere, 160°C, and normal pressure environment; then, the temperature is raised to 320°C at a rate of 30°C per hour, Then under this temperature condition, the pressure is slowly decreased from 760 torr to below 3 torr, and the temperature is raised from 320°C to 340°C; after that, the stirring power is increased, the pressure is increased, the material is discharged, the strands are pulled, and the pellets are cut to obtain a melting point of about Liquid crystal polymer resin with a viscosity (@300°C) of about 45Pa·s at 278°C.

preparation example 2

[0050] Preparation Example 2: Liquid Crystal Polymer Resin

[0051] In a 3-liter autoclave, 440 grams of 6-hydroxyl-2-naphthoic acid, 1145 grams of 4-hydroxybenzoic acid, 1085 grams of acetic anhydride and 1.3 grams of sodium phosphite were mixed and placed in a nitrogen atmosphere, The acetylation reaction was carried out at 160°C and normal pressure for about 2 hours; then, the temperature was raised to 320°C at a rate of 30°C per hour, and then the pressure was slowly decreased from 760 torr to below 3 torr at this temperature, and the temperature was increased from Raise the temperature from 320°C to 340°C; after that, increase the stirring power, increase the pressure, discharge, pull strands, and pelletize to obtain a liquid crystal polymer resin with a melting point of about 305°C and a viscosity (@320°C) of about 40Pa·s.

[0052] Liquid crystal polymer film

Embodiment 1

[0053] Embodiment 1: liquid crystal polymer film

[0054] Select the liquid crystal polymer resin of the aforementioned Preparation Example 1, put the liquid crystal polymer resin into an extruder with a screw diameter of 27 mm (instrument model: ZSE27, purchased from Leistritz) and heat to 300° C. to 320° C.; (kg / hr) feeding speed to extrude the liquid crystal polymer resin from a T-die with a width of 500mm; then, pass it into a tube with a distance of about 20mm from the T-die, a temperature of about 300°C and a diameter of about 35cm to 45cm Between the two casting wheels, press out with a force of about 20 kilonewtons (kN) to 60kN; then send to the cooling wheel for room temperature cooling to obtain a liquid crystal polymer film with a thickness of about 50 μm.

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Abstract

The invention provides a laminated board, a circuit board and a liquid crystal polymer film used for the laminated board and the circuit board. The laminated plate comprises a metal foil and a liquid crystal polymer film, the liquid crystal polymer film in the laminated plate has a dielectric loss (Df '0) before moisture absorption, a dielectric loss (Df' 1) after moisture absorption and a dielectric loss change rate (Delta Df '), and the dielectric loss change rate is calculated according to the following formula: Delta Df'can be less than or equal to 16%. By controlling the delta Df'of the liquid crystal polymer film in the laminated plate, the signal loss generated when a circuit board formed by the laminated plate transmits signals at low frequency, intermediate frequency and high frequency and the signal loss change rate before and after moisture absorption can be relieved and / or inhibited, so that the laminated plate can be suitable for high-order or outdoor high-frequency electronic products.

Description

technical field [0001] The present invention relates to a laminate, a circuit board, and a liquid crystal polymer film (liquid crystal polymer film) used therein, especially a kind of film suitable for transmission in low-frequency, intermediate-frequency, and high-frequency bands. Laminated boards, circuit boards, and liquid crystal polymer films for signal electronic products. Background technique [0002] With the rapid development of mobile communication technology, the industry is actively developing the fifth generation mobile communication technology (5th generation mobile networks, referred to as 5G), in order to optimize the data transmission speed, response time, system capacity and other performance of 4G communication technology. [0003] Since 5G communication technology uses high-frequency bands for signal transmission, the higher the operating frequency of the signal, the more significant the attenuation and distortion of the signal during transmission, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/03
CPCH05K1/0353H05K3/38H05K2201/0141C09K2219/03C09K19/3809C08G63/065B29D7/01B29K2105/0079B32B2307/748B32B7/12B32B15/18B32B2457/08B32B7/022B32B2250/40B32B2307/20B32B2307/50B32B2307/714B32B2307/732B32B2307/7246B32B15/098B32B27/28B32B27/36B32B2307/204B32B2307/728B32B15/20B32B27/42B32B2307/538B32B15/09B32B15/043B32B2307/306B32B2250/03H05K1/0326H05K3/022H05K1/024C08J5/18C08J2367/04B32B2367/00B32B15/08C08G63/83H05K1/032C08G2250/00B32B2305/55C08G63/06C08G63/60C08L67/04C08L2203/16B32B2307/704B29C41/12B29K2067/00
Inventor 杜安邦陈建钧吴佳鸿
Owner CHANG CHUN PLASTICS CO LTD
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