Filler disposition film

Patent metadata

Field	Value
Publication number	US-11732105-B2
Application number	US-202117513432-A
Country	US
Kind code	B2
Filing date	Oct 28, 2021
Priority date	May 5, 2016
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A filler disposition film that can use a commercially procurable filler material having good particle diameter uniformity, enables high positional precision of the filler disposition, can support even an increase in the surface area, and has a prescribed filler regularly disposed in a long resin film. Moreover, the rate of consistency of disposition of the filler in the filler disposition film in rectangular areas of a prescribed size having a length of 1000 times or more the average particle diameter of the prescribed filler, and a width of 0.2 mm or greater is 90% or greater. Such a rectangular area has a long-side direction that is substantially parallel to the long-side direction of the filler disposition film, and a widthwise direction that is substantially parallel to a short-side direction of the filler disposition film. The average particle diameter of the regularly disposed filler is from 0.4 μm to 100 μm.

First claim

The invention claimed is:

1. A filler disposition film, wherein the filler disposition film is wound onto a winding core to form a film wound body, the filler disposition film comprising:
a resin film comprising a film length of 5 m or more and a film width and having fillers having an average particle diameter of 100 μm or less being regularly disposed in a two-dimensional lattice disposition pattern, wherein a rate of consistency of disposition of the fillers in rectangular areas repeated along the film length is 90% or greater, each rectangular area having a predetermined size comprising a length substantially parallel to the film length of 1000 times or more of the average particle diameter of the filler and a width substantially parallel to the film width of 0.2 mm or greater,
wherein the rate of consistency of disposition of the fillers is measured by capturing images of any two rectangular areas and then overlapping the imagesvia imaging processing such that a number of the fillers for which a center position overlaps is maximized, the center position being a circular area of diameter not more than 25% of the average particle diameter of the filler, wherein the rate of consistency of disposition of the filler is a ratio of the number of overlapped fillers to a total number of fillers in the two rectangular areas, and

wherein the filler disposition film further comprises at least one of:
(i) predetermined filler omission locations repeated along the film length, each filler omission location being a filler that is absent/removed from the lattice disposition pattern,
(ii) predetermined filler omission areas repeated along the film length, each filler omission area being multiple fillers that are absent/removed in a converged area from the lattice disposition pattern,
(iii) predetermined different disposition areas repeated along the film length, each different disposition area being the fillers regularly disposed in a pattern different from the lattice disposition pattern.

2. The filler disposition film of claim 1 , wherein the rate of consistency of disposition of the fillers is 98% or greater.

3. The filler disposition film of claim 1 , wherein the average particle diameter is 400 nm or greater.

4. The filler disposition film of claim 1 , wherein the diameter of the circular area is not more than 10% of the average particle diameter.

5. The filler disposition film of claim 1 , wherein a minimum distance between the fillers is more than 80% of the average particle diameter of the filler.

6. The filler disposition film of claim 1 , wherein the rectangular areas are regularly or randomly located along the film length.

7. The filler disposition film of claim 1 , wherein the length of each rectangular area is 50,000 times or less the average particle diameter of the filler.

8. The filler disposition film of claim 1 , wherein the width of each rectangular area is 500 mm or less.

9. The filler disposition film of claim 1 , wherein the film length is up to 5,000 m.

10. The filler disposition film of claim 1 , wherein a number density of the fillers is from 100 fillers/cm 2 to 50,000,000 fillers/cm 2 .

11. The filler disposition film of claim 1 , wherein the fillers comprise metal particles, resin particles, metal-coated resin particles, and/or ceramic particles.

12. The filler disposition film of claim 1 , wherein the fillers have substantially the same shape and size.

13. The filler disposition film of claim 12 , further comprising fillers of a different size, shape, and/or material mixed therein, wherein a repeated unit of the disposition of fillers is observed by the disposition of the fillers having substantially the same shape and size, wherein the repeating unit can be used as an index for determining regularity of filler disposition.

14. The filler disposition film of claim 1 , wherein the filler disposition film comprises irregularly aggregated fillers, wherein an irregularly aggregated filler is a lattice location comprising two or more disposed fillers, and a percentage of irregularly aggregated fillers is 10% or less.

15. The filler disposition film of claim 1 , wherein the fillers are flush with a film surface of the resin film.

16. The filler disposition film of claim 15 , wherein the fillers are exposed at the film surface of the resin film and a corresponding concavity is formed around the exposed portion of the filler.

17. The filler disposition film of claim 1 , wherein a length of the predetermined filler omission locations, predetermined filler omission areas, or the predetermined different disposition areas is 400 mm or less.

18. The filler disposition film of claim 1 , wherein at least one of predetermined filler omission locations or predetermined filler omission areas is formed as a buffer zone for cutting out and grasping or wherein the predetermined filler omission locations, predetermined filler omission areas, or the predetermined different disposition areas are formed as zones for coding and lot control.

19. A method for controlling the filler disposition film of claim 1 , the method comprising: marking in advance or photographing and recording the predetermined filler omission locations, predetermined filler omission areas, or the predetermined different disposition areas.

20. A conductive film comprising the filler deposition film of claim 1 , wherein the fillers are conductive particles.

21. An anisotropic thermally-conductive film comprising the filler disposition film of claim 1 , wherein the fillers are thermally conductive fillers.

Assignees

• Dexerials Corp

Inventors

• Akutsu Yasushi
• Tsukao Reiji

Classifications

• H10W72/30

  Die-attach connectors · CPC title

• C08K3/34

  Silicon-containing compounds · CPC title

• C08J2463/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• C08J2371/10

  from phenols · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title