JP2004031486A - Protective spacer for film type substrate and its manufacture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective spacer which retains an interval between mutual spacers superposed in up-and-down at a constant value and facilitates the reeling work of the same, and the manufacturing method of the protective spacer which improves the dimensional accuracy of the protective spacer and shortens the manufacturing time of the same. <P>SOLUTION: The protective spacer 5 is interposed between film type substrates to protect the wound film type substrates. The protective spacer 5 is provided with a sheet part 51 having substantially the same width (b) and substantially the same length L as those of the film type substrate, and solid projected parts 52, 52, formed integrally with both ends in a direction orthogonally crossing the lengthwise direction of the sheet 51 and projected into the direction of thickness t1 of the sheet 51. The thickness t2 in the direction orthogonally crossing the lengthwise direction of the sheet 51 of the projected parts 52, 52 is specified so as to be larger than the thickness t1 of the sheet 51. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a protective spacer for a film-like substrate and a method for manufacturing the same.
[0002]
[Prior art]
As is well known, a film substrate uses a photographic film tape body as a circuit board, and a circuit pattern is formed on the tape body with copper foil.Electronic components are provided on one or both sides of the circuit pattern. Be attached. Examples of the film substrate include a TAB (Tape Automated Bonding) tape and a COF (Chip On Film) tape.
[0003]
This film substrate has 35mm, 48mm, 70mm specifications depending on its width. It can be used as a substitute for printed circuit boards for display parts of mobile phones and notebook computers, CPUs and chipsets of notebook computers, ink jet printers, medical equipment, watches, etc. used.
[0004]
The standard of the film substrate follows the standard of a photographic film, and continuous holes are provided at both ends in the longitudinal direction in the same manner as a normal photographic film. The circuit pattern of the copper foil printed on the surface of the film-like substrate is ultra-precise, and, for example, the foot portions for wiring are formed at intervals of about 20 microns.
[0005]
By the way, this film-shaped substrate is wound around a bobbin and transported. At this time, in order to prevent the film-shaped substrates from being rubbed and damaged, it is necessary to interpose a protective spacer between the wound film-shaped substrates. General.
[0006]
As shown in FIG. 8, the conventional protective spacer 1 has a sheet portion 10 having substantially the same width as the film-like substrate, and embossed round protrusions 11, 11,. Was formed. The projections 11, 11,... Are alternately formed on the front and back of the sheet portion 10, as shown in FIG.
[0007]
As shown in FIG. 10, when the protective spacer 1 is wound together with the film-like substrate 12, the interval between the vertically overlapping protective spacers 1, 1 can be maintained at a certain value or more by the projections 11, 11. it can. Thereby, it is possible to prevent the film-like substrate 12 sandwiched between the protection spacers 1 and 1 from rubbing against each other.
[0008]
The surface of the protective spacer 1 is coated with a conductive material (conductive ink) so that the film-shaped substrate 12 wound therewith is not charged.
[0009]
Conventionally, a method for manufacturing the protective spacer 1 is as follows. First, a 640 mm wide sheet material (film-like sheet) produced by a stretching method is cut into, for example, a 35 mm width by slitter processing, and this is hot-pressed using a mold. The projections 11 were formed by passing through a processing machine.
[0010]
[Problems to be solved by the invention]
However, in the conventional protection spacer 1, the protrusions 11, 11 of the protection spacers 1, which are vertically stacked, may not be able to maintain the interval between the protection spacers 1, 1. In this case, there is a possibility that the circuit pattern of the film-like substrate 12 and the mounted electronic components are damaged.
[0011]
Further, since the projections 11 are provided intermittently at intervals, the upper and lower projections 11 may be fitted to each other. In this case, the film portion of the film substrate to be protected becomes deformed (wavy). Therefore, there was a problem that the winding operation became difficult.
[0012]
Further, since the protective spacer 1 is manufactured by press molding, there are the following problems. That is, the thickness of the raw material has a variation called uneven thickness, and the uneven thickness affects the use of the slitter, which may cause distortion in the width dimension after the slitter processing. When the molding process is performed using the material having the distortion, the dimensions of the product may be affected.
[0013]
In addition, when a product is manufactured by press molding, the dimensions of a mold are limited, and in that case, adjustment between shots (a boundary between the quantities manufactured at a time and the quantity) is required. In the case of press molding, there is a possibility that dimensional variations may occur in the product depending on the raw material lot and molding conditions.
[0014]
SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. A protective spacer which can maintain a constant interval between vertically overlapping protective spacers and is easy to wind up, and a dimensional accuracy. It is an object of the present invention to provide a method of manufacturing a protective spacer which can increase the manufacturing cost and shorten the manufacturing time.
[0015]
[Means for Solving the Problems]
The present invention relates to a protective spacer for a film-like substrate and a method of manufacturing the same, and is configured as follows to solve the above-described technical problem. That is, the present invention is a protective spacer interposed between the film-like substrates to protect the wound film-like substrate, a sheet portion having substantially the same width and substantially the same length as the film-like substrate, A solid convex portion integrally formed at both ends in a direction perpendicular to the longitudinal direction of the sheet portion and projecting in the thickness direction of the sheet portion, wherein the convex portion is continuously formed over the entire length of the sheet portion. And a thickness of the convex portion in a direction perpendicular to a longitudinal direction of the sheet portion is larger than a thickness of the sheet portion.
[0016]
According to the present invention, since the protruding portion is solid and formed continuously in the longitudinal direction of the sheet portion, the upper and lower surfaces of the protruding portion are flat over the entire length, and the protection spacers vertically overlap. Of the protective spacers can be prevented from being fitted to each other, whereby the distance between the protective spacers can be kept constant over the entire length.
[0017]
Further, the thickness and the protruding height of the convex portion can be set according to the size of the electronic component mounted on the sheet portion. In this case, the electronic components having different sizes and shapes are formed on the film-shaped substrate. Even when components are mounted, the distance between the protective spacers can be maintained, and the circuit and the electronic components on the film-like substrate can be prevented from being damaged by contact with the protective spacers.
[0018]
Further, the convex portions can be provided on both surfaces of the sheet portion. In this case, the present invention can be applied even when electronic components are mounted on both surfaces of the film-like substrate.
[0019]
Further, the present invention is a method of manufacturing the protective spacer, wherein the sheet portion and the convex portion are manufactured by extrusion molding, and then formed into a material having substantially specified dimensions by cooling, and then the material is formed. It is characterized in that it is finished to specified dimensions through a mold.
[0020]
According to the method of molding the protective spacer, the thickness of the solid convex portion in the width direction of the sheet portion can be made thicker than the sheet portion, and is not affected by the raw material unlike press molding, so that the dimensional accuracy is high. In addition, the manufacturing time can be shortened as compared with the case where the sheet portion and the convex portion are bonded.
[0021]
The above components can be combined with each other as much as possible.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a protective spacer for a film-like substrate according to the present invention will be described in detail with reference to the drawings.
(1st Embodiment)
FIG. 1 is a view showing a protection spacer 5 according to a first embodiment of the present invention. The protective spacer 5 is interposed between the film substrates 6 and 6 to protect the wound film substrate 6 when the film substrate 6 (see FIG. 4) is transported.
[0023]
The protection spacer 5 is formed integrally with a sheet portion 51 having substantially the same width b and substantially the same length L as the film-like substrate 6 and at both ends in a direction perpendicular to the longitudinal direction of the sheet portion 51. It has rectangular solid protruding portions 52 projecting in the thickness t1 direction.
[0024]
In the present embodiment, the convex portions 52, 52 are provided only on one surface of the sheet portion 51. The thickness t2 of the convex portions 52, 52, that is, the thickness t2 in the direction perpendicular to the longitudinal direction of the sheet portion 51 is larger than the thickness t1 of the sheet portion 51.
[0025]
As shown in FIG. 2, the thickness t2 of the convex portions 52, 52 is constant over the entire length L, and the interval between the convex portions 52, 52 on both sides is also the same over the entire length. Further, as shown in FIG. 3, the protrusion height h of the projections 52, 52 is constant over the entire length.
[0026]
The thickness t2 and the protruding height h of the convex portions 52, 52 are set according to the size of the electronic component 61 (see FIG. 4) mounted on the film substrate 6. That is, the thickness t2 and the height h are set so that the electronic component 61 does not contact the convex portions 52, 52 and the sheet portion 51 when the film-like substrate 6 and the protective tape 5 are laminated.
[0027]
The sheet portion 51 and the convex portions 52, 52 are integrally formed of, for example, polypropylene, but may be formed of other suitable materials such as polyester and nylon. In addition, a conductive material (conductive ink) is applied to the surfaces of the sheet portion 51 and the convex portions 52, 52 in order to prevent the film-shaped substrate 50 from being charged.
[0028]
When the film-like substrate 6 is transported by the protective spacer 5, as shown in FIG. 4, the film-like substrate 6 and the protective spacer 5 are wound together in a stacked state.
[0029]
Then, both ends of the film-shaped substrate 6 are supported by the protruding portions 52, 52 of the protective spacer 5, and the electronic component 61 mounted on the film-shaped substrate 6 is inserted into the gap between the protruding portions 52, 52. .
[0030]
Here, rectangular, solid convex portions 52, 52 provided on the protective spacer 5 are continuously formed over the entire length of the protective spacer 5, and the upper and lower surfaces of the convex portions 52, 52 extend over the entire length. Since it is flat, the upper and lower projections do not fit each other as in the prior art, and the distance between the upper and lower protective spacers 5 can be kept constant over the entire length.
[0031]
This can prevent the circuit pattern of the film-like substrate 6 and the electronic component 61 from being damaged by contact with the protective spacer 5. In addition, the work of winding the film-like substrate 6 and the protective tape 5 becomes easy. Therefore, the protective spacer 5 is suitable for transporting a TAB tape, a COF tape, or the like.
(2nd Embodiment)
In the above-described first embodiment, the convex portions 52, 52 are provided only on one surface of the sheet portion 51. However, like the protection spacer 7 of the second embodiment shown in FIG. , 52 can be integrally molded. Note that the sheet portion 51 and the convex portion 52 are the same as the protective spacer 5 of the first embodiment.
[0032]
This protective spacer 7 is suitable when electronic components 81, 81 are mounted on both surfaces of a film-like substrate 8 as shown in FIG.
(Third embodiment)
FIG. 7 is a flowchart showing a method for manufacturing the protection spacers 5 and 7. In this manufacturing method, first, the sheet portions 51 and the convex portions 52, 52 of the protective spacers 5, 7 are integrally formed by extrusion (step 81).
[0033]
Next, the molded protective spacers 5 and 7 are cooled and finished to approximately specified dimensions. Thus, a material close to the final shape and dimensions is formed (step 82). Thereafter, the material is passed through a mold and finished to a specified size (step 83).
[0034]
The above manufacturing method is a so-called sizing method in extrusion molding. There is another stretching method in extrusion molding. In this stretching method, since a tensile force acts on the product, if the convex portions 52, 52 having a special shape are molded by the stretching method, the size and shape will vary. Was not adopted this time.
[0035]
As described above, according to the manufacturing method of the present invention, since the protective spacers 5 and 7 are molded by the sizing method, which is a kind of extrusion molding, the slitting step performed by the conventional press molding can be omitted, and the bias in the raw material can be reduced. The dimensional accuracy can be increased without being affected by the meat.
[0036]
Also, there is no limitation on the dimensions of the mold as in press molding, and adjustment between shots is unnecessary. Furthermore, since the long protective spacers 5 and 7 can be manufactured continuously, the manufacturing time can be reduced as compared with a method of attaching the sheet portion 51 and the convex portion 52 separately, for example.
[0037]
【The invention's effect】
As described above, according to the protective spacer of the present invention, the convex portions integrally formed at both ends in the direction perpendicular to the longitudinal direction of the sheet portion are solid, and the convex portions extend along the longitudinal direction of the sheet portion. Since the protective spacers are formed continuously, it is possible to prevent the convex portions of the protective spacers that overlap one another from being fitted to each other, and thereby to keep the interval between the protective spacers constant.
[0038]
Further, when the film-shaped substrate and the protective spacer are wound one upon another, the winding operation is facilitated. This can prevent the film-like substrate laminated on the protective spacer and its electronic components from being damaged.
[0039]
Further, according to the method of manufacturing the protective spacer of the present invention, the dimensional accuracy can be improved because the method is not affected by the uneven thickness of the raw material unlike the press molding. In addition, the manufacturing time can be reduced as compared with a case where the sheet portion and the convex portion are manufactured separately, and they are bonded together.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a protective spacer according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
FIG. 3 is a sectional view taken along line BB of FIG. 2;
FIG. 4 is a cross-sectional view illustrating a usage state of the protection spacer according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating a protection spacer according to a second embodiment of the present invention.
FIG. 6 is a diagram illustrating a use state of a protective spacer according to a second embodiment of the present invention.
FIG. 7 is a flowchart illustrating a method of manufacturing a protective spacer according to a third embodiment of the present invention.
FIG. 8 is a view showing a protection spacer according to a conventional example.
FIG. 9 is a plan view showing a protection spacer according to a conventional example.
FIG. 10 is a cross-sectional view illustrating a usage state of a protection spacer according to a conventional example.
[Explanation of symbols]
5, 7 Protection spacer 6, 8 Film-shaped substrate 51 Sheet portion 52 Convex portion 61, 81 Electronic component h Projection height t2 of convex portion Thickness of convex portion

Claims (4)

A protective spacer interposed between the film-like substrates to protect the wound film-like substrate,
A sheet portion having substantially the same width and substantially the same length as the film-like substrate,
A solid projection integrally formed at both ends in a direction perpendicular to the longitudinal direction of the sheet portion and projecting in the thickness direction of the sheet portion;
A thickness of the convex portion in a direction perpendicular to a longitudinal direction of the sheet portion is larger than a thickness of the sheet portion. The protective spacer according to claim 1, wherein the thickness and the protruding height of the convex portion are set according to the size of an electronic component mounted on the seat portion. The protection spacer according to claim 1, wherein the convex portion is provided on both surfaces of the sheet portion. A method for producing a protective spacer according to any one of claims 1 to 3,
After manufacturing the sheet portion and the convex portion by extrusion molding, forming a material having a substantially prescribed size by cooling, and then passing the material through a mold to finish it to a prescribed size. Production method.

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