JP2015160879A - release sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a release sheet which enables easy manufacture of an adhesive sheet allowing pasting without formation of bubbles between an adherend and it.SOLUTION: A release sheet RL is to be adhered temporarily to an adhesive sheet AS through its one contact surface RA, and the contact surface RA has a first concave part HL whose first point-like deepest part DP side, the deepest part of a point-like 1, is deeper than the outer edge EG side at any position separated from the first point-like deepest part DP. The first concave part HL is formed so that a first peak TP of 1 capable of point contact with an adherend can be formed in an adhesive AD layer of the adhesive sheet AS of 1.

Description

  The present invention relates to a release sheet.

Conventionally, when affixing them so that no bubbles are formed at the adhesive interface between the adhesive sheet and the adherend surface of the adherend, the adhesive sheet and / or adherend are bent and gradually stuck to expel air. Or affixed in a vacuum atmosphere.
On the other hand, an easy-adhesive pressure-sensitive adhesive sheet (adhesive sheet) that can release air at the adhesion interface after being attached to an adherend is known (see, for example, Patent Document 1).
This adhesive sheet is manufactured using a release sheet, and has a pressure-sensitive adhesive layer (adhesive layer) in which a plurality of spherical convex portions are provided and an air flow path is formed between adjacent convex portions. Air bubbles on the adhesion interface are allowed to escape through the air flow path after being attached to the adherend, so that bubbles are not formed on the adhesion interface.

Japanese Patent No. 5112603

  However, an adhesive sheet manufactured using a conventional release sheet as described in Patent Document 1 requires an operation for expelling air at the adhesive interface after an operation of attaching the adhesive sheet to an adherend. There is a disadvantage that two operations are necessary.

  The objective of this invention is providing the peeling sheet which can manufacture the adhesive sheet which can be stuck so that a bubble may not be easily formed between to-be-adhered bodies.

  In order to achieve the above object, the release sheet of the present invention is a release sheet in which one contact surface is temporarily attached to an adhesive sheet, and the one contact surface is a point-like deepest part of the first one. At any position apart from the one point deepest part, the first point deepest part side has a first recess provided deeper than the outer edge side, and the first recess can make point contact with the adherend. A configuration is adopted in which one first vertex is provided on the adhesive layer of one adhesive sheet so as to be formed.

  Another release sheet of the present invention is a release sheet in which one contact surface is temporarily attached to an adhesive sheet, wherein the one contact surface is a first linear deepest portion that is a linear deepest portion. The first linear deepest portion side has a first concave portion provided deeper than the outer edge side at any position separated from the portion, and the first concave portion is a first first contactable to the adherend. A configuration is adopted in which one top line is provided so as to be formed on the adhesive layer of one adhesive sheet.

At this time, in the release sheet of the present invention, the second concave portion provided with the second point deepest portion, which is a point-like deepest portion, on the other contact surface located on the opposite side of the one contact surface. It is preferable that the second recess is provided so that a second vertex capable of making point contact with the adherend is formed on an adhesive layer of one adhesive sheet different from the adhesive sheet.
In the release sheet of the present invention, the second concave portion provided with the second linear deepest portion, which is the linear deepest portion, is provided on the other contact surface located on the opposite side of the one contact surface. It is preferable that the second recess is provided so that a second top line that can be brought into line contact with the adherend is formed on an adhesive layer of one adhesive sheet different from the adhesive sheet.
Furthermore, in the release sheet of the present invention, when the adhesive sheet is temporarily attached to the deepest portion of the first recess, an air escape portion that can vent or store air interposed between the adhesive sheet and the first recess. Is preferably provided.

  According to the present invention as described above, by laminating the adhesive so as to enter the entire first concave portion, one first vertex that can make point contact with the adherend or one first that makes line contact. An adhesive layer having a top line and having the first vertex side or the first top line side thicker than the outer edge side at any position separated from the first vertex or the first vertex line. The 1 adhesive sheet which can be formed can be formed for every 1st recessed part, and the adhesive sheet which can be stuck so that a bubble may not be easily formed between to-be-adhered bodies can be manufactured. The adhesive sheet manufactured as described above is formed by the first operation in which the first vertex or the first top line is brought into contact with the adherend and the adhesive sheet is pressed against the adherend as it is. Can be attached so as to gradually expel air from the first vertex or the first top line to the outer edge side.

At this time, if the second contact portion of the release sheet is provided with the second concave portion provided with the second deepest point portion or the second deepest linear portion, the second vertex or the point contactable to the adherend or The 2nd top line which can be line-contacted can be formed in the adhesive bond layer of another adhesive sheet. Thereby, for example, one release sheet is wound and pressed, or a plurality of release sheets are stacked and pressed so that the second recess overlaps the adhesive layer laminated on the entire first recess. The double-sided adhesive sheet having the second apex or the second apex on the opposite side of the first apex or the first apex can be produced between the release sheets.
Further, if an air escape portion is provided at the deepest point-like or linear shape, the adhesive and the first concave portion or the second concave portion are stacked when the adhesive is laminated so as to enter the entire first concave portion or the entire second concave portion. By removing the air that exists between the recesses from the air escape part or storing it in the air escape part, air is collected in the part of the adhesive sheet that extends from the first or second vertex or the first or second top line to the outer edge. It is possible to prevent formation of irregularities in the adhesive layer.

(A) is a perspective view of the peeling sheet which concerns on 1st Embodiment of this invention, (B) is a side view of the peeling sheet and adhesive sheet of (A). (A) is a perspective view of the peeling sheet which concerns on 2nd Embodiment of this invention, (B) is a side view of the peeling sheet and adhesive sheet of (A). (A)-(H) are explanatory drawings of the peeling sheet which concerns on the modification of this invention. (A)-(D) are explanatory drawings of the peeling sheet which concerns on the other modification of this invention.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
Detailed description of the same configuration in each embodiment is omitted.
In the first and second embodiments and modifications, the X axis, the Y axis, and the Z axis are orthogonal to each other, the X axis and the Y axis are axes in a predetermined plane, and the Z axis is The axis is orthogonal to the predetermined plane. Further, in the first and second embodiments and the modification examples, when viewed from the direction of the arrow AR parallel to the Y axis, and when indicating the direction, “up” is the arrow direction of the Z axis and “down” is In the opposite direction, “left” is the arrow direction of the X axis, “right” is the opposite direction, “front” is the arrow direction of the Y axis, and “rear” is the opposite direction.

1A and 1B, a release sheet RL is used for manufacturing an adhesive sheet AS to be attached to an adherend (not shown) (for example, a semiconductor wafer).
The release sheet RL is one in which one contact surface RA is temporarily attached to the adhesive sheet AS, and the one contact surface RA is from the first deepest point DP, which is the deepest point of the dotted one. The first pointed deepest portion DP side has a first recessed portion HL provided deeper than the outer edge EG side at any spaced position, and the first recessed portion HL is capable of making point contact with the adherend. The first vertex TP is provided so as to be formed on the adhesive AD layer of one adhesive sheet AS. That is, the first concave portion HL has the first point-like deepest portion DP located at the center of the first concave portion HL, and is inclined linearly from the first point-like deepest portion DP toward the outer edge EG in a side view. A substantially conical adhesive surface forming surface FC for forming the adhesive surface FA of the adhesive AD layer, and a substantially cylindrical side surface forming surface FD for forming the side surface FB of the adhesive AD layer. Yes. Thereby, it has one surface and the other surface located in the other side of the said one surface, and one surface is made into adhesive agent AD layer, and adhesive agent AD layer can be in point contact with a to-be-adhered body. It is possible to form an adhesive sheet AS provided with one first vertex TP and having the first vertex TP side thicker than the outer edge ED side at any position spaced from the first vertex TP. . The adhesive sheet AS is formed in a shape (for example, a circle) matching the shape of the adherend with the other surface being the base material BS, and the adhesive AD layer has the first vertex TP located at the center of the adhesive sheet AS. In addition, a substantially conical adhesive surface FA and a substantially cylindrical side surface FB that are linearly inclined in a side view from the first vertex TP toward the outer edge ED side are provided.
Note that the first point deepest portion DP is provided with an air escape portion EX that can release or store air interposed between the adhesive sheet AS and the adhesive sheet AS when the adhesive sheet AS is temporarily attached. . The air escape portion EX includes, for example, a through hole HA for venting air as indicated by reference numeral AA in FIG. 1B, a bottomed hole HB for storing air as indicated by reference numeral BB in FIG. It can be illustrated.

The base material BS, the adhesive AD layer, and the release sheet RL are not particularly limited, and the base material BS is, for example, paper such as fine paper, glassine paper, and coated paper, and these papers are thermoplastic resins such as polyethylene. Laminated paper, polyester (eg, polyethylene terephthalate, polyethylene naphthalate), polyolefin (eg, polypropylene, polyethylene), polyvinyl chloride, polyvinylidene chloride, polystyrene, polycarbonate, polyvinyl alcohol, polyurethane, acrylic resin, cellulose Examples include cellulose such as triacetate, cellulose diacetate, and cellophane, rubber such as natural rubber and silicon rubber, wood, metal, ceramics, glass, stone, etc. and having a thickness of 1 μm to 100 mm. That.
The adhesive AD layer is composed of an acrylic, rubber-based, or silicone-based pressure-sensitive adhesive, and examples thereof have a thickness of 1 μm to 5 mm.
The release sheet RL may be formed in a strip shape or a sheet-like shape. Examples of the release material RL include those exemplified for the base material BS and those exemplified for the base material BS. Silicone release agents, alkyl pendant release agents, condensed waxes It is composed of a laminate of release agents such as a series release agent, a fluorine release agent, a polyester release agent, or a material composed of a silicone resin, an alkyl pendant resin, a condensed wax resin, a fluorine resin, a polyester resin, etc. The thing which has a thickness of 10 mm can be illustrated.
In addition, the thickness of these base material BS, adhesive agent AD layer, and peeling sheet RL may be more than the above-mentioned example thickness in light of technical common sense, and may be below the example thickness. Moreover, although the depth DT of the 1st point deepest part DP can illustrate a thing of 1 micrometer-5 mm, the depth beyond it may be sufficient in consideration of the thickness of the peeling sheet RL, and the depth below it may be sufficient.
The adhesive AD layer preferably has fluidity when laminated on the release sheet RL or when pressed against the adherend. When laminated on the release sheet RL, the adhesive AD layer is formed on the adhesive surface forming surface FC. It is preferable that the convex shape of the adhesive AD layer is squeezed and the thickness becomes substantially uniform (substantially equal) when entering the first concave portion HL along with the pressing and pressing the adherend. The adhesive AD layer may be one that exhibits fluidity or improves fluidity by applying an external force such as heating or cooling. Further, when the adherend side is deformable, the adhesive AD layer may have low fluidity or no fluidity when pressed against the adherend.

When the adhesive sheet AS is manufactured using the release sheet RL as described above, first, at least the entire first concave portion HL is formed on one abutting surface RA of the release sheet RL by hand or an adhesive sheet manufacturing apparatus (not shown). A fluid adhesive AD is applied or laminated so as to block the film. Next, the adhesive AD layer is cured by a curing means such as a dryer such as a heater or a dryer or an ultraviolet irradiation device. This curing may be complete curing or incomplete curing, or may not be cured by a curing means. Next, after pasting or laminating the base material BS on the cured adhesive AD layer, the base material BS is cut from the base material BS along the outer edge EG of the first recess HL by a cutting means such as a cutter blade or a laser. And making cuts in the adhesive AD layer. The position where the cut is formed may be a position that completely coincides with the outer edge EG of the first recess HL, or may be a position inside or outside the outer edge EG. When the cut is formed outside the outer edge EG, the adhesive sheet After sticking AS to a to-be-adhered body, the outer side of the said outer edge EG can also be cut | disconnected and excluded. Thereafter, the base material BS with the adhesive AD layer located outside the cut is peeled from the release sheet RL by a winding means such as a roller or suction. As a result, an adhesive AD layer composed of the adhesive surface FA formed by the adhesive surface forming surface FC and the side surface FB formed by the side surface forming surface FD is formed, and the adhesive sheet AS is manufactured. When applying or laminating the adhesive AD on one abutment surface RA, the air existing between the adhesive AD and the first recess HL is extracted to the outside from the through hole HA as the air escape portion EX or By storing in the bottomed hole HB, it is possible to prevent an air reservoir from being formed on the adhesive surface FA of the adhesive sheet AS and forming irregularities on the adhesive sheet AS.
When adhering the adhesive sheet AS to the adherend, the adhesive sheet AS is supported from the base material BS side by a support means having a support surface composed of a predetermined plane. Thereafter, the adherend surface of the adherend and the support surface supporting the adhesive sheet AS are arranged substantially in parallel, and the support means and the adherend are relatively moved and pressed in a direction substantially orthogonal to the support surface. Thereby, the first vertex TP first comes into contact with the adherend surface, and thereafter, the adhesive surface FA is gradually stuck toward the outer edge by the relative movement thereof. That is, the first apex TP is brought into contact with the adherend and the adhesive sheet AS is pressed against the adherend as it is so that air bubbles are not easily formed between the adherend and the adherend. AS can be affixed to an adherend.

  According to the first embodiment as described above, it is possible to manufacture the adhesive sheet AS that can be easily attached so that bubbles are not formed between the adherend and the adherend.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In addition, about the same structure as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
2A and 2B, the release sheet RLA is used for producing an adhesive sheet ASA to be attached to an adherend (not shown) (for example, a glass plate).
In the release sheet RLA, one contact surface RA is temporarily attached to the adhesive sheet ASA, and the one contact surface RA extends from the first linear deepest portion DL, which is the deepest portion of the linear one. The first linear deepest portion DL side has a first concave portion HLA provided deeper than the outer edge EG side at any spaced position, and the first concave portion HLA can be in line contact with the adherend. The first top line TL is provided so as to be formed on the adhesive AD layer of one adhesive sheet ASA. That is, the first recessed portion HLA is inclined linearly in a side view from the first linear deepest portion DL toward the outer edge EG side, with the first linear deepest portion DL passing through the center of the first recessed portion HLA. An adhesive surface forming surface FC1 in which two surfaces for forming the adhesive surface FA1 of the adhesive AD layer are connected at a predetermined angle, and a side surface forming surface FD1 for forming the side surface FB1 of the adhesive AD layer are provided. . Thereby, it has one surface and the other surface located on the opposite side of the one surface, and the one surface is an adhesive AD layer, and the adhesive AD layer can be in line contact with the adherend. It is possible to form an adhesive sheet ASA that includes a first top line TL and is thicker on the first top line TL side than the outer edge ED side at any position spaced from the first top line TL. It has become. Note that the first top line TL is formed by a connecting portion between two surfaces in the adhesion surface forming surface FC1. The adhesive sheet ASA is formed in a shape (for example, a circle) matching the shape of the adherend with the other surface being the base material BS, and the adhesive AD layer has the first top line TL at the center of the adhesive sheet ASA. As described above, there are provided an adhesive surface FA1 in which two surfaces inclined linearly in a side view from the first top line TL toward the outer edge ED side are connected at a predetermined angle, and a substantially cylindrical side surface FB1.
The first linear deepest portion DL is provided with an air escape portion EX1 similar to that of the first embodiment. The air escape portion EX1 includes, for example, a through hole HA1 for venting air as indicated by reference numeral CC in FIG. 2B, a bottomed hole HB1 for storing air as indicated by reference numeral DD in FIG. It can be illustrated. Note that one or a plurality of through holes HA1 and bottomed holes HB1 may be provided continuously or intermittently over the entire longitudinal direction of the first linear deepest portion DL, or may be provided only in part.

There is no restriction | limiting in particular as peeling sheet RLA, The thing similar to 1st Embodiment can be illustrated, The depth of the 1st linear deepest part DL in the adhesive surface formation surface FC1 of 1st recessed part HLA is 1 micrometer-5 mm. Although a thing can be illustrated, the depth beyond it may be sufficient in consideration of the thickness of release sheet RLA, and the depth below it may be sufficient.
When the adhesive sheet ASA is manufactured using the release sheet RLA, it can be manufactured in the same manner as in the first embodiment.
When the adhesive sheet ASA is affixed to the adherend, it can be affixed in the same manner as in the first embodiment. The first top line TL is brought into contact with the adherend and the adhesive sheet AS is directly attached to the adherend. The adhesive sheet ASA can be affixed to the adherend so that air bubbles are not easily formed between the adherend and the adherence by one operation of pressing.

  According to the second embodiment as described above, the same effects as those of the first embodiment can be obtained.

  As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations. In addition, the description of the shape, material, and the like disclosed above is exemplary for ease of understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of some or all of such restrictions is included in this invention.

For example, as shown in FIG. 3 (A), the release sheet having the point-like deepest portion in the present invention has the first point-like deepest portion DP located at the center of the first recess HLB, and the first point-like deepest portion. This is a release sheet RLB in which a first concave portion HLB is configured from a substantially quadrangular pyramid-shaped adhesive surface forming surface FC2 that is inclined linearly or curvedly in a side view or a front view from the front, rear, left, and right from the DP. May be. Note that the adhesive surface forming surface FC3 may have a substantially triangular pyramid shape, or a substantially pentagonal pyramid or more such as a substantially pentagonal pyramid, a substantially hexagonal pyramid, and the like.
Furthermore, as shown in FIG. 3 (B), the release sheet of the present invention has an adhesive surface forming surface in which the arcuate deepest portion is the first point deepest portion DP or the first linear deepest portion DL as viewed from the side. A release sheet RLC in which the first recess HLC is configured including FC3 may be used.
In addition, as shown in FIG. 3C, the release sheet in the present invention has an adhesive surface forming surface FC4 in which the first point deepest portion DP or the first linear deepest portion DL is displaced from the center of the first recess HLD. A release sheet RLD in which the first concave portion HLD is included may be used. That is, regardless of the shape of the bonding surface forming surface, the position of the first point deepest portion DP or the first linear deepest portion DL formed there is the center of the first recess or the first recess. It may be a position passing through the center, or a position not passing through the center of the first recess or the center of the first recess.
Furthermore, as shown in FIGS. 3D and 3E, the release sheet in the present invention has a curved substantially conical or pyramid-shaped adhesive surface forming surface in which the inclined surface is convex or concave in a side view. Release sheets RLE and RLF in which the first recesses HLE and HLF are configured including FC5 and FC6 may be used.
In addition, as shown in FIGS. 3 (F) and 3 (G), the release sheet in the present invention includes broken-line adhesive surface forming surfaces FC7 and FC8 whose inclined surfaces are bent in a convex shape and a concave shape in a side view. The release sheets RLG and RLH in which one concave portion HLG and HLH are configured may be used.

  Further, as shown in FIG. 3 (H), the release sheet in the present invention is a double-sided adhesive sheet having no base material BS and one surface and the other surface being composed of one adhesive AD layer. The adhesive sheet AT is formed in the same shape as the adhesive surface FA of the first embodiment, and the first and second adhesive surfaces FA21, FA22 having the first and second vertices TP1, TP2 are arranged below the side surface FB and The release sheet RLP used for manufacturing the double-sided adhesive sheet AT composed of the adhesive AD layer provided on the upper side may be used. Specifically, the release sheet RLP has a point-like deepest portion on the other contact surface RB located on the opposite side of the one contact surface RA of the release sheet RL of the first embodiment. A second recess HLP provided with a deepest portion DPP is provided, and the second recess HLP has a second vertex TP2 that can make point contact with the adherend as a single adhesive sheet different from the double-sided adhesive sheet AT. It is provided on the adhesive layer of the adhesive sheet AT so as to be formed. In addition, the second point deepest portion DPP of the second recess HLP of the other contact surface RB is phased to the right or left side of the first point deepest portion DP of the first recess HL of the one contact surface RA. Provided (not required to be phased). When the double-sided adhesive sheet AT is manufactured using such a release sheet RLP, the step of laminating the base material BS in manufacturing the adhesive sheet AS is omitted, and the first adhesive surface FA21 and the side surface are provided on the release sheet RLP. An adhesive AD layer composed of FB is formed. Thereafter, one release sheet RLP is wound and pressed such that the second recess HLP overlaps the adhesive AD layer, or a plurality of release sheets RLP are stacked and pressed, so that the upper part of the adhesive AD layer Enters the second recess HLP, and the double-sided adhesive sheet AT is manufactured between the release sheets RLP. Note that a thin base material such as an oblate may be provided on the second adhesive surface FA22, and the base material may also be formed in a sharp shape like the second adhesive surface FA22. One or more second point-like deepest portions DPP may be provided in one second recess HLP.

Furthermore, as shown in FIG. 4 (A), the release sheet in the present invention has the first linear deepest portion DL passing through the center of the first concave portion HLJ and left and right from the first linear deepest portion DL in a side view. The release sheet RLJ in which the first recessed portion HLJ is configured by the adhesive surface forming surface FC9 in which two surfaces inclined in a straight line shape, a curved shape, or a broken line shape are connected at a predetermined angle may be used.
In the release sheet of the present invention, as shown in FIG. 4 (B), the first linear deepest portion DL coincides with one of the left and right end edges of the first recess HLK, and the first linear deepest portion DL. Even in the release sheet RLK in which the first concave portion HLK is configured from one adhesive surface forming surface FC10 that is inclined in a straight line shape, a curved shape, or a polygonal line shape in a side view on the other end edge side of the left and right from the side. Good.
Furthermore, as shown in FIG. 4C, the release sheet in the present invention has a first linear deepest portion DL passing through the center of the first recess HLL, and a side view or a front view from the first linear deepest portion DL. The release sheet RLL in which the first concave portion HLL is configured by the four adhesive surface forming surfaces FC11 inclined in a straight line shape, a curved line shape, or a broken line shape in the left and right and front and rear directions and the side surface forming surface FD2 may be used.
In addition, as shown in FIG. 4D, the release sheet in the present invention includes the first recess HLM including the adhesive surface forming surface FC12 that does not have any front and rear inclined surfaces in the release sheet RLL described above. A release sheet RLM may be used.

Furthermore, the release sheet capable of producing a double-sided adhesive sheet according to the present invention has one of the contact surfaces shown in FIGS. 1, 2, 3 (A) to (G), and 4 (A) to (D). The first concave portion having the shape shown in FIG. 1 and the shape shown in any of FIGS. 1, 2, 3 </ b> A to 3 </ b> G, and 4 </ b> A to 4 </ b> D on the other contact surface. It is good also as a 2nd recessed part, The upper and lower surfaces may be the 1st, 2nd recessed part of the same shape, and the 1st, 2nd recessed part of a different shape may be sufficient, and the same depth may be sufficient. The depth may be used, and in such a configuration, the first point deepest portion or the first linear deepest portion of one abutting surface is replaced with the second point deepest portion or the second linear deepest portion of the other abutting surface. The phase may be provided either in front, back, left, or right with respect to the part, or may be provided without being phased. In addition, when making the 2nd recessed part of the other contact surface into the shape shown in either of FIG. 2, FIG. 4 (A)-(D), the other contact surface is shown in FIG. 3 (H). As shown, a second concave portion HLP having a deep second linear deepest portion DLL, which is the deepest portion of the linear shape, is provided, and the second concave portion HLP has a second top line TL2 that can be in line contact with the adherend. Is formed on the adhesive AD layer of one double-sided adhesive sheet AT different from the double-sided adhesive sheet AT on the first recess HL side. One or more second point-like deepest portions DPP may be provided in one second recess HLP.
Further, the side surface forming surfaces FD and FD1 to FD5 may not be provided in the first recesses of the release sheets RL and RLA to RLP in the present invention.
Furthermore, the planar shape of the first and second recesses of the release sheet of the present invention and the planar shape of the adhesive sheet may be a circle, an ellipse, a polygon such as a triangle or a pentagon, and other irregular shapes. The shape is not affected at all, and the shape may not be matched to the shape of the adherend.
The first and second point deepest portions DP and DPP or the first and second linear deepest portions DL and DLL may or may not be provided with the air escape portions EX and EX1. In some cases, one or more may be used. Moreover, you may provide both the through-hole HA and the bottomed hole HB in the 1st 1st point deepest part DP and DPP or 1st linear deepest part DL and DLL.
Further, the first linear deepest portion DL may be curved or bent in a polygonal line downward (viewed from the X-axis direction in FIG. 2), or curved in plan view (viewed from above in FIG. 2). Or you may bend in the shape of a broken line.
Further, the second linear deepest portion DLL may be bent or bent in a bent line shape when viewed from the front (viewed from the X-axis direction in FIG. 3 (H)), or as viewed in plan (FIG. 3 (H)). (Viewed from above) It may be curved or bent.
Also, the release sheet RL may be provided with a plurality of first and second recesses, and the plurality of first and second recesses may be the first and second recesses having the same shape or different shapes. 1 and a 2nd recessed part may be sufficient.
Further, the method of manufacturing the adhesive sheet AS, ASA, AT, etc. using each release sheet RL, RLA to RLP may be other than the above-described method, for example, the adhesive sheet AS as in the first and second embodiments. When manufacturing ASA, it is good also as a strip | belt-shaped adhesive sheet, without forming a notch in base material BS and adhesive agent AD layer. In this case, the band-shaped adhesive sheet may be cut so as to have an arbitrary shape after the band-shaped adhesive sheet is attached to the adherend. Moreover, when manufacturing double-sided adhesive sheet AT as mentioned above, it is good also as a strip | belt-shaped double-sided adhesive sheet, without forming notch | incision in adhesive agent AD layer. In this case, after the belt-like double-sided adhesive sheet is affixed to the adherend, the belt-like double-sided adhesive sheet is cut so as to have an arbitrary shape, and another adherend is adhered thereon. .

  Further, the material, type, shape, etc. of the adhesive sheet and adherend manufactured by the release sheet in the present invention are not particularly limited. For example, the adhesive sheet may be a circle, an ellipse, a polygon such as a triangle or a quadrangle, or other shapes, or may be of an adhesive form such as pressure sensitive adhesive or heat sensitive adhesive. When an adhesive sheet is used, it may be bonded by an appropriate method such as providing a heating means such as an appropriate coil heater or heat pipe for heating the adhesive sheet. Such an adhesive sheet is, for example, a single layer having only an adhesive layer, an intermediate layer made of the same material as the base material BS between the base material and the adhesive layer, and an upper surface of the base material. There may be three or more layers, such as having a cover layer, and a so-called double-sided adhesive sheet that can peel the substrate from the adhesive layer. It may be a layer having an intermediate layer or a single layer or a multilayer having no intermediate layer. Examples of the adherend include, for example, foods, resin containers, semiconductor wafers such as silicon semiconductor wafers and compound semiconductor wafers, circuit board, information recording substrates such as optical disks, glass plates, steel plates, ceramics, wood plates or resin plates, Arbitrary forms of members and articles can also be targeted. It should be noted that the adhesive sheet is replaced with functional and intended readings, for example, any shape such as information description label, decorative label, protective sheet, dicing tape, die attach film, die bonding tape, recording layer forming resin sheet Any sheet, film, tape or the like can be attached to any adherend as described above.

AD ... Adhesive AS, ASA ... Adhesive sheet AT ... Double-sided adhesive sheet (adhesive sheet)
DL, DLL ... 1st, 2nd linear deepest part DP, DPP ... 1st, 2nd point deepest part EG ... Outer edge EX, EX1 ... Air escape part HL, HLA, HLB, HLC, HLD, HLE, HLF, HLG, HLH, HLJ, HLK, HLL, HLM, HLP ... 1st recessed part HLP ... 2nd recessed part RA, RB ... One, the other contact surface RL, RLA, RLB, RLC, RLD, RLE, RLF, RLG, RLH , RLJ, RLK, RLL, RLM, RLP ... release sheet TL, TL1, TL2 ... first, first, second top line TP, TP1, TP2 ... first, first, second vertex

Claims (5)

In the release sheet in which one contact surface is temporarily attached to the adhesive sheet,
The first abutment surface is provided with a first point-like deepest portion deeper than the outer edge side at any position spaced from the first point-like deepest portion, which is a point-like deepest portion. Having a recess,
The release sheet is characterized in that the first concave portion is provided so that one first vertex that can make point contact with an adherend can be formed on the adhesive layer of one adhesive sheet. In the release sheet in which one contact surface is temporarily attached to the adhesive sheet,
The one abutment surface has a first linear deepest portion side deeper than the outer edge side at any position spaced from the first linear deepest portion, which is the deepest portion of the linear one. Having a recess,
The release sheet is characterized in that the first concave portion is provided so that one first top line that can be in line contact with an adherend is formed on an adhesive layer of one adhesive sheet. The other contact surface located on the opposite side of the one contact surface is provided with a second concave portion provided with a second point-like deepest portion which is a point-like deepest portion,
The second concave portion is provided so that a second vertex capable of making point contact with an adherend is formed in an adhesive layer of one adhesive sheet different from the adhesive sheet. The release sheet according to claim 2. The other contact surface located on the opposite side of the one contact surface is provided with a second recessed portion provided with a second linear deepest portion which is a linear deepest portion,
The second concave portion is provided so that a second top line capable of being in line contact with an adherend is formed in an adhesive layer of one adhesive sheet different from the adhesive sheet. Or the peeling sheet of Claim 2.   The deepest portion of the first recess is provided with an air escape portion that can vent or store air interposed between the adhesive sheet and the adhesive sheet when temporarily attached. The release sheet according to any one of claims 1 to 4.

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