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A stretchable or bendable composite circuit system and its preparation method

A composite circuit and circuit system technology, applied in the direction of printed circuit manufacturing, printed circuit, circuit substrate materials, etc., can solve problems such as complex equipment and circuit damage, and achieve reduced deformation field, easy pre-deformation, compatibility and matching sex-enhancing effect

Inactive Publication Date: 2019-08-27
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current problems with this method of circuit wrinkling based on elastic substrates include: a large pre-stretch is required to avoid damage to the circuit due to excessive stretching / bending during use
And when local pre-stretching is required, the constraints and equipment that need to be imposed will be very complicated

Method used

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  • A stretchable or bendable composite circuit system and its preparation method
  • A stretchable or bendable composite circuit system and its preparation method
  • A stretchable or bendable composite circuit system and its preparation method

Examples

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preparation example Construction

[0026] The invention discloses a method for preparing a stretchable or bendable composite circuit system, which comprises the following steps:

[0027] S1: Preparation of elastic shape memory polymer;

[0028] S2: pre-stretching the elastic shape memory polymer prepared in step S1 by 10%-150% at 60-120°C, and then cooling down to room temperature to fix the temporary shape of the elastic shape memory polymer;

[0029] S3: Prepare a circuit system by spraying, pasting or circuit printing process inside or on the surface of the pre-stretched elastic shape memory polymer obtained in step S2;

[0030] S4: heating triggers the shape recovery of the elastic shape memory polymer treated in step S3, causing the circuit system to form wrinkles, and a stretchable or bendable composite circuit system is obtained.

[0031] In step S1, the hot melt adhesive component is added to the liquid silicone elastomer, fully stirred evenly at 85°C, and then cooled to room temperature, then the curi...

Embodiment 1

[0046] Prepare two pieces of silica gel-type elastic shape memory polymers, respectively stretch the two pieces of polymers uniaxially by 30% at a higher temperature (such as 100° C.), and then cool down to room temperature to fix the temporary shape. After the circuit is printed on the surface of a pre-stretched polymer, the two sheets of polymer are glued together with silicone, with the circuit in the middle. After the silicone has cured, heating again triggers deformation recovery and wrinkles the circuit. The double-layer unidirectional pre-stretched flexible composite circuit system is shown in figure 2 .

Embodiment 2

[0048] Through the following four steps, a single-layer unidirectional pre-stretched shape-memory polyurethane type stretchable / bendable composite circuit system is prepared. Specific steps include:

[0049] (1) A piece of shape memory polyurethane film is prepared by solvent evaporation method or hot pressing method;

[0050] (2) Pre-stretch 20% in one direction at 80°C, and then lower it to room temperature to fix the temporary shape;

[0051] (3) Prepare circuits by processes such as spraying on the surface of the pre-stretched polyurethane film;

[0052] (4) Heating-triggered shape recovery leads to the formation of micro-nano wrinkles in the circuit. A series of micro-nano wrinkled surfaces produced by shape-memory shrinkage have been prepared. The optical photographs, scanning electron microscope and atomic force microscope photographs of representative samples are as follows: image 3 shown.

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Abstract

The invention discloses a stretchable or bendable composite circuit system and a fabrication method thereof. The method comprises the following steps of S1, fabricating an elastic shape memory polymer; S2, pre-stretching the elastic shape memory polymer fabricated in the step S1 by 10-150% under 60-120 DEG C, cooling to a room temperature and fixing a temporary shape of the elastic shape memory polymer; S3, fabricating a circuit system in the pre-stretched elastic shape memory polymer or a surface of the pre-stretched elastic shape memory polymer by a spraying or pasting or circuit printing process; and S4, heating and trigging the elastic shape memory polymer processed in the step S3 to restore, and causing the circuit system to form drape and obtain the stretchable or bendable composite circuit system. The invention also discloses the stretchable or bendable composite circuit system. The elastic shape memory polymer is employed to be combined with the relatively rigid circuit system so as to achieve a bendable / stretchable effect of a circuit.

Description

technical field [0001] The invention relates to a circuit system and a preparation method thereof, in particular to a stretchable or bendable composite circuit system and a preparation method thereof. Background technique [0002] Flexible electronic devices are currently a hot research and development direction at home and abroad, and have potential wide applications in wearable electronic devices, flexible sensor devices and other fields. On the one hand, the conductive path of electrons is constructed on the body or the surface; on the other hand, the polymer endows the material with flexibility and deformability. However, the electrical conductivity is reduced because the deformation of the material in its entirety results in deformation of the electronic pathways. At present, in order to solve the problem of electronic channels maintaining conductivity in a deformed state, a widely used method is to fabricate electronic circuits on pre-stretched flexible substrates, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/00H05K3/10H05K1/02H05K1/03
Inventor 罗洪盛黄为民周兴东王华权
Owner GUANGDONG UNIV OF TECH
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