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stretchable circuit board

A circuit substrate and flexibility technology, applied in the directions of printed circuit, printed circuit, printed circuit manufacturing, etc., can solve the problems of reduced flexibility, damaged elongation, increased installation area, etc., to ensure flexibility and flexibility, The effect of suppressing destruction

Inactive Publication Date: 2019-08-06
FUJIKURA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in conventional flexible circuit boards, there is a problem that the extensibility of the entire substrate is impaired due to the existence of a hard expansion and contraction preventing protector on the substrate, thereby reducing the stretchability and flexibility.
In addition, since the expansion and contraction prevention protector is arranged on the outer side of the substrate than the electrical connection part on the device mounting substrate, the actual mounting area of ​​the electronic device on the substrate increases, which may lead to a decrease in the mounting density.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0034] figure 1 It is a plan view showing the stretchable circuit board 1 according to the first embodiment of the present invention, figure 2 yes figure 1 The A-A' line sectional view. in addition, image 3 It is a flowchart showing the manufacturing process of the stretchable circuit board 1 .

[0035] Such as figure 1 with figure 2 As shown, the stretchable circuit board 1 according to the first embodiment includes a stretchable base material 10 and stretchable wiring 20 formed on the stretchable base material 10 . In addition, the elastic circuit board 1 includes an electronic device 30 mounted on the elastic base material 10 and a connection portion 40 electrically connecting the connection terminal 31 of the electronic device 30 to the wiring terminal 21 of the elastic wiring 20 .

[0036] Furthermore, the stretchable circuit board 1 includes a cover portion 50 formed to cover the stretchable substrate 10 including, for example, the electronic device 30 , the con...

no. 2 approach

[0069] Figure 4 It is a sectional view showing the stretchable circuit board 1A according to the second embodiment of the present invention. exist Figure 4 In , the same reference numerals are attached to the same components as those in the first embodiment, and repeated descriptions will be omitted below.

[0070] Such as Figure 4 As shown, in the stretchable circuit board 1A according to the second embodiment, the connection portion 40 is formed so as to cover also a part of the connection terminal 31 of the electronic device 30 on the back surface 33 side. This point is different from the case where the connection portion 40 is formed to cover only the lower end of the connection terminal 31 in the stretchable circuit board 1 of the first embodiment described above.

[0071] Even with such a configuration, the same effects as those of the stretchable circuit board 1 according to the first embodiment can be achieved.

no. 3 approach

[0073] Figure 5 It is a plan view showing the stretchable circuit board 1B according to the third embodiment of the present invention. in addition, Image 6 yes Figure 5 The B-B' line sectional view. In addition, in Figure 5 In , illustration of the stretchable insulating film 60 is omitted. In addition, in Figure 5 with Image 6 In , the same reference numerals are attached to the same components as those in the first embodiment, and repeated descriptions will be omitted below.

[0074] Such as Figure 5 with Image 6 As shown, in the stretchable circuit board 1B according to the third embodiment, the cover portion 50 is formed to cover only the portion where the connection portion 40 is formed, and the upper surface of the stretchable base material 10 other than the connection portion 40 is exposed. . This point is different from the case where members other than the connecting portion 40 are also covered by the covering portion 50 in the stretchable circuit bo...

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PUM

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Abstract

The present invention provides a stretchable circuit board comprising: a stretchable base material; stretchable wiring formed on the stretchable base material; and an electronic device mounted on the stretchable circuit board. on the base material; and a connecting portion that electrically connects the electronic device and the stretchable wiring, has stretchability, and has a Young's modulus greater than or equal to the stretchable wiring. In addition, a stretchable insulating film is provided, and the stretchable insulating film is formed on the stretchable base material and the stretchable wiring except the portion where the connection portion is formed.

Description

technical field [0001] The present invention relates to a stretchable circuit board on which electronic devices are mounted, and more particularly to a stretchable circuit board capable of mounting electronic devices at a high density while ensuring the stretchability and flexibility of the entire board. Background technique [0002] In recent years, stretchable circuit boards capable of expanding and contracting on a curved surface or flat surface have been developed. As one type of such a stretchable circuit board, for example, a flexible circuit board is known (see Patent Document 1 below). This flexible circuit board has a stretchable circuit body in which a stretchable wiring portion is provided on a stretchable insulating base material. In addition, there is also a non-stretchable device mounting substrate laminated on a predetermined region of the stretchable circuit body. Furthermore, it has the electrical connection part which electrically connects the wiring part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K1/18H05K1/02H05K1/09H05K3/28H05K3/32
CPCH05K1/0281H05K1/038H05K3/284H05K3/285H05K2201/0133H05K2201/0314H05K1/0277H05K1/0283H05K1/189
Inventor 小椋真悟
Owner FUJIKURA LTD