TWI418500B - Wafer type electronic parts storage paper seat - Google Patents

Description

Wafer type electronic parts storage paper holder Technical field

The present invention relates to a paper-based electronic component storage paper holder. In particular, the present invention relates to a wafer-type electronic component storage paper holder which is less likely to produce fine hair and has excellent formability.

The wafer-type electronic component storage paper holder of the present invention is excellent in adhesion stability to the cover tape, and can prevent the fine hair from falling off from the paper seat or rarely falling off when the cover tape is peeled off.

Background technique

The wafer type electronic component storage paper holder is usually formed into a carrier for a wafer type electronic component by performing the following processing on the paperboard cardboard.

(1) The paperboard is cut longitudinally into a strip of a predetermined width.

(2) An angular hole (recess or through hole) and a circular hole (through hole) of a predetermined size are formed on the formed cardboard tape. The corner hole is for accommodating the wafer type electronic component, and the round hole is for moving the paper seat for accommodating the electronic component in the loader.

(3) The cover tape is attached to the inside of the paper holder (bottom side), and the bottom opening portion of the angular through hole is sealed to form an angular recess. Further, the paper holder may be angularly embossed without forming an angular through hole to form an angular recess of a predetermined size. At this time, the subsequent step of the aforementioned bottom side cover tape may be omitted. When the cover tape is attached to the paper holder, a method of attaching the cover tape to the paper holder and applying heat and pressure from the cover tape to perform the subsequent method, the so-called heat sealing method, is used.

(4) loading the wafer type electronic component through the opening portion to the aforementioned angular recess In the ministry.

(5) The cover tape is attached to the surface (upper side) of the paper holder by a heat sealing method to seal the opening of the angular recess, thereby producing a paper holder for accommodating the wafer type electronic component.

(6) The paper holder for accommodating the wafer type electronic component is wound around a predetermined size reel and shipped.

(7) The user of the last face peels off the upper side cover tape from the surface of the paper holder that houses the wafer-type electronic component, and then takes out the wafer-type electronic component housed therein from the angular recessed portion.

In order to meet the above-mentioned uses, the quality of the storage paper holder should be: (1) not adversely affecting the loaded wafer-type electronic components; (2) the surface of the paper holder is sufficiently smooth so that the cover tape can be smoothly followed. (3) High mechanical strength and the like which can sufficiently withstand various treatments performed on the paper holder.

In the case of the quality defect of the storage paper holder, fine hair is generated from the paper layer. Fine hair refers to a fine pulp fiber that protrudes from the surface of the paper seat when the inner wall surface of the corner hole and the user of the last surface peel off the cover tape. When the inner side surface of the corner hole for electronic component storage and the surface of the paper seat when the cover tape is peeled off, the wafer-type electronic component is taken out, the nozzle of the mounter is blocked, and the wafer-type electronic component is contaminated. The reason for the hindrance.

In addition, when the adhesion between the paper holder and the cover tape is not uniform, the paper holder vibrates when the cover tape is peeled off from the paper holder, and the electronic component flies out from the angular recess and/or the storage position changes. The removal operation of the electronic parts cannot be performed smoothly, resulting in a problem of reduced installation efficiency.

Moreover, the pasting speed of the pasting machine for attaching the cover tape to the paper seat has been rapidly increasing. With the increase in the speed of this adhesive, the paper holder and The strength of the adhesive between the cover tapes tends to be weak, so that the strength of the paper holder which can be followed by the high strength and then the cover tape is strong. However, there is a problem that the above-mentioned adhesive strength is enhanced, and the fine hair generated by peeling off the cover tape is increased. Therefore, it is desirable to provide a paper holder which is less likely to generate fine hair even if the adhesive strength of the cover tape is strong.

In the method of impregnating the resin into the inner wall surface of the through hole, the method of accommodating the inner surface of the wafer type electronic component is disclosed in Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. The method of preventing fine hair on the inner wall of the hole. In JP-A-2002-53195 (Patent Document 3), a method of managing the blending ratio of softwood and hardwood and the density of a paper substrate to prevent the generation of fine hair has been disclosed. In JP-A-2005-92910 (Patent Document 4), a technique of containing a specific resin on a surface layer to prevent fine hair has been disclosed. In JP-A-2003-226393 (Patent Document 5), it has been disclosed that a resin impregnated layer is provided by impregnating a resin from the surface of the paper seat belt to a depth of 30 to 50 μm. The above method is insufficient in the effect of preventing the fine hair, and the obstruction caused by the fine hair generated in the corner hole cannot be solved.

[Patent Document 1] JP-A-11-165786 [Patent Document 2] Japanese Patent Publication No. Hei 10-218281 [Patent Document 3] JP-A-2002-53195 [Patent Document 4] JP-A-2005-92910 [Patent Document 5] JP-A-2003-226393

Invention

The present invention provides a wafer-type electronic component storage paper holder which is capable of suppressing generation of fine hair on an inner wall surface of a concave portion in which a wafer-type electronic component is housed in a paper holder which is formed of a cardboard and has a plurality of concave portions for accommodating the wafer-type electronic component. When the cover tape is peeled off from the surface of the paper seat, the hair does not fall off from the surface of the paper seat, or rarely falls off.

In the wafer type electronic component storage paper holder which is composed of a conventional multi-layer cardboard, the inventors confirmed that the pulp fiber has a free surface after verifying that the inner wall surface of the electronic component housing recess and the surface of the cover tape are peeled off to generate a large amount of fine hair. The portion which is equivalent to the depth of the total of the three pulp fibers is separated, and the heat sealant of the cover tape is impregnated into the gap formed between the pulp fibers by the surface layer of the paper seat to a depth of 40 μm to 50 μm. The present inventors have also found that by increasing the depth of the fiber from the surface of the paper seat to a depth of more than 50 μm and to a deeper portion, the network structure composed of the pulp fibers of the surface layer of the paper seat is fixed, and the pulp fibers are left in the portion. The voids can suppress the fine hairs on the inner wall surface of the concave portion and the surface after peeling of the cover tape, and the present invention has been completed.

The wafer-type electronic component storage paper holder of the present invention includes a paper substrate and a plurality of concave portions formed on the paper substrate for accommodating the wafer-type electronic component, wherein the paper substrate has a surface layer, a middle layer, and an inner layer. a multi-layer paperboard structure, and a surface treatment agent containing a water-soluble polymer is impregnated into the paper substrate from a depth of the opening side surface of the concave portion by more than 50 μm, and the center line of the opening side surface of the concave portion of the paper substrate is rough The degree (Ra) is adjusted to be 3 μm or more.

In the wafer type electronic component storage paper holder of the present invention, the surface treatment agent preferably has an adjustment of 10 mPa. The viscosity below s is applied to the paper substrate at a dry coating amount of less than 1.1 g/m ² .

In the wafer-type electronic component storage paper holder of the present invention, the water-soluble polymer contained in the surface treatment agent is preferably at least one selected from the group consisting of polyvinyl alcohol, starch, and polypropylene decylamine.

In the wafer type electronic component storage paper holder of the present invention, the surface treatment agent preferably contains the water-soluble polymer and contains a styrene-maleic acid copolymer resin or an olefin-maleic acid copolymer. Resin.

In the wafer type electronic component storage paper holder of the present invention, the pulp fiber forming the surface layer of the paper substrate is preferably a hardwood kraft pulp, and the ratio of the inner cavity width (L1) / fiber width (L2) is 0.4 or less. .

In the wafer-type electronic component storage paper holder of the present invention, when a concave portion or a through hole for forming the concave portion for electronic component storage is formed thereon, fine hair is not generated on the inner wall surface of the concave portion or the through hole, and paper is generated. When the surface of the opening of the recessed portion of the seat is peeled off from the cover tape covering the cover, no fine hair is generated or extremely small in the peeling surface. Therefore, the wafer-type electronic component storage paper holder of the present invention has an effect that the wafer-type electronic component housed in the concave portion and/or taken out from the concave portion is not contaminated by fine hair, and is sucked when the wafer is taken out by the mounter. The mouth will not be blocked by fine hair.

Best form for implementing the invention

In the wafer type electronic component storage paper holder of the present invention, the surface treatment agent containing the water-soluble polymer is super-extended from the opening side surface of the concave portion of the paper substrate It is important to soak the depth of 50 μm deep into the paper substrate to increase the adhesion strength between the pulp fibers constituting the paper substrate. When the surface treatment agent in the paper substrate has a depth of 50 μm or less, the bonding force between the pulp fibers is insufficient, and fine hair is easily generated, and the paper seat and the cover tape are different due to the thickness of the pulp fibers distributed on the surface of the substrate. The peeling force between them will be uneven. Further, since the surface treatment agent is impregnated to a depth of more than 50 μm, the network structure of the pulp fibers in the portion having a sufficient thickness on the surface of the paper substrate can be fixed, so that the opening side surface and the concave portion of the concave portion of the paper holder can be sufficiently suppressed. Fine hair is generated on the wall surface, and unevenness in peeling force between the paper seat and the cover tape can be sufficiently suppressed.

At present, various techniques for impregnating the entire surface of the paper substrate with the surface treatment agent and techniques for allowing the surface treatment agent to exist only on the surface of the paper substrate have been proposed. Conventionally, when the treatment agent is deeply penetrated from the surface of the paper substrate, the unevenness of the penetration depth or the amount of penetration of the surface treatment agent increases. Further, it is also known that when the network structure of the pulp fibers on the surface portion of the paper seat is fixed by the surface treatment agent, the voids between the fibers are also filled together, and the adhesion of the cover tape is remarkably lowered. In order to eliminate the above problems, the surface treatment agent is evenly immersed, the unevenness of the bonding strength between the paper holder and the cover tape is reduced, and the adhesion and the peelability are improved. It is important to control the viscosity and composition of the surface treatment agent. of. In the present invention, the viscosity of the surface treatment agent is adjusted to 4~10 mPa. s, recoated or impregnated onto the surface of the paper substrate to saturate it in the paper substrate. The penetration depth is deeper than 50 μm, preferably deeper than 55 μm, and better than 60 μm deep. Although the deeper the better, but deeper than 100 μm, the effect will be saturated, which is economically disadvantageous. Even if the viscosity of the surface treatment agent is reduced to less than 4mPa. s, the surface treatment agent is further deeply impregnated into the paper substrate, if the required amount of surface treatment The agent cannot be distributed substantially evenly in the surface treatment agent impregnation portion of the paper substrate, and the bonding strength between the fibers cannot be maintained at a high level. Therefore, it is necessary to adjust the viscosity of the surface treatment agent to 4mPa. s above. Also, when the aforementioned viscosity exceeds 10 mPa. At s, the surface treatment agent stays on the surface portion of the paper substrate and is not easily soaked in the paper substrate to a depth exceeding 50 μm. The viscosity of the surface treatment agent can be measured by a B-type viscometer. Since the permeability of the surface treatment agent is greatly affected by the viscosity, in the present invention, the management of the temperature of the surface treatment agent which affects the viscosity is strictly performed. In the present invention, the treatment temperature of a surface treating agent is preferably in the range of 40 ° C to 70 ° C, and the management temperature is preferably 60 ° C, which is a temperature at which the viscosity of the surface treating agent is stable.

Further, the coating amount or the impregnation amount of the surface treatment agent is preferably 0.1 to 1.1 g/m ^{2 and more} preferably 0.6 to 1.1 g/m ² . As long as the surface treatment agent is coated or impregnated in a large amount, it can be deeply penetrated from the surface of the paper substrate according to the viscosity, but as a result, it is economically disadvantageous, and the surface treatment agent on the surface of the paper seat is excessively attached. Excessive filling of the gaps between the pulp fibers results in a situation in which the strength of the cover tape is lowered.

The smoothness of the surface of the paper substrate used in the present invention is preferably such that the center line average surface roughness (Ra) prescribed in JIS B 0601 is about 3 μm or more. When the average center roughness of the center line is less than 3 μm and the smoothness is too high, since the heat seal component of the cover tape is increased in area along the surface of the paper seat, the adhesive strength of the cover tape to the surface of the paper substrate is too high. When the cover tape is peeled off, it is difficult to peel off, and the unevenness of the peeling force required for peeling off the cover tape is increased, and the paper seat is vibrated. Moreover, when the average center roughness (Ra) of the center line exceeds 6 μm, the smoothness of the paper substrate is too low, and the cover tape and the paper base are made. The adhesion of the surface of the material is too low.

The surface treatment agent used in the present invention contains a water-soluble polymer. The water-soluble polymer includes polyvinyl alcohol having water solubility, starch, polypropylene decylamine, acrylic resin, styrene-butadiene resin, styrene-isoprene resin, polyester resin, In the present invention, at least one selected from the group consisting of polyvinyl alcohol, starch, and polypropylene decylamine is used in the ethylene-vinyl acetate resin, the vinyl acetate-vinyl alcohol resin, and the urethane resin. Among them, polyvinyl alcohol, starch and polypropylene decylamine can efficiently and inexpensively increase the mutual strength of the pulp fibers, and the coating suitability to the surface of the paper seat is also good.

Among the above water-soluble polymer materials, the indoleamine group in the molecule of the polypropylene amide group is formed between the hydroxyl group in the cellulose and the hemicellulose molecule, or the amide group of the polypropylene decylamine itself. Hydrogen bonding increases the amount of hydrogen bonds acting between the fibers, thereby enhancing the bonding of the pulp fiber network structure, and efficiently suppressing the generation of fine hair. Further, the surface treatment agent containing polypropylene decylamine having a molecular weight of 50,000 to 500,000 is easy to adjust its viscosity and is excellent in permeability to the inside of the paper substrate. Further, the polypropylene decylamine having a molecular weight of 50,000 to 300,000 has high permeability to the inside of the paper substrate, and is particularly suitable for use as a surface treatment agent used in the present invention.

The surface treating agent used in the present invention preferably contains a styrene-maleic acid copolymer resin or an olefin-maleic acid copolymer resin to improve the adhesion to the cover tape and to improve the surface of the paper seat. Strength of. The styrene-maleic acid copolymer resin and the olefin-maleic acid copolymer resin have both a hydrophobic group and a hydrophilic group, which are coated on the surface of the paper seat. The cover layer is formed and penetrated into the paper base material layer to form a hydrogen bond between the carboxylic acid group which is a hydrophilic group and the pulp fiber, and a crosslinked state is formed between the fibers, whereby the bonding force between the fibers can be greatly improved. By increasing the bonding force between the fibers, the resistance at the time of peeling off the cover tape from the surface of the paper seat can be enhanced, the peel strength can be enhanced, and the fibers which become fine hair can be prevented from falling off.

Further, the glass transition temperature of the styrene-maleic acid copolymer resin and the olefin-maleic acid copolymer resin is preferably 10 to 50 °C. If the glass transition temperature is less than 10 ° C, a styrene-maleic acid copolymer resin and/or an olefin-butylene group which are present in a crosslinked state and exist between the pulp fibers in a bonding temperature at the time of adhering the cover tape The fiber bonding strength of the diacid copolymer resin may be insufficient. Further, when the glass transition temperature of the copolymer resin is more than 50 ° C, the crosslinked body of the pulp fiber and the copolymer resin is too hard, so that the surface of the paper seat is subjected to the pressure at the time of peeling off from the cover tape layer. Damage, causing the damaged part to produce fine hair.

In the present invention, by appropriately controlling the coating amount or the impregnation amount of the styrene-maleic acid copolymer resin or the olefin-maleic acid copolymer resin, the generation of fine hair can be suppressed and the cover tape and the paper holder can be obtained. Then the required level of strength. When the styrene-maleic acid copolymer resin or the olefin-maleic acid copolymer resin is mixed in the surface treatment agent, the ratio of the solid content to the water-soluble polymer can be appropriately adjusted, and the styrene-cis is appropriately adjusted. The coating amount or impregnation amount of the butenedioic acid copolymer resin or the olefin-maleic acid copolymer resin is preferably in the range of 0.01 to 0.10 g/m ² . When the coating amount or impregnation amount of the styrene-maleic acid copolymer resin or the olefin-maleic acid copolymer resin is more than 0.10 g/m ² , the effect is saturated, and when it is less than 0.01 g When /m ² , the effect cannot be clearly expressed.

In the wafer-type electronic component storage paper holder of the present invention, the mechanism for applying or immersing the surface treatment agent on the surface of the paper holder can be, for example, a bar coater, a knife coater, an air knife coater, a stick coater, or a gate roll coating. A roll coater such as a size press or a calender coater, a double-sided blade coater, a roll-to-roll coater, or the like. Among them, the size applicator and the calender coater are more suitable for use in the present invention because the surface treatment agent is deeply impregnated into the paper substrate by nip.

The type of the raw material pulp for forming the paper substrate for the wafer-type electronic component storage paper holder of the present invention can be adjusted to have a smoothness of the surface treatment agent, and the smoothness of the surface can be adjusted within a specific range. limit. That is, the paper substrate forming pulp can be used, for example, chemical pulp (hardwood, softwood), mechanical pulp, old paper pulp, non-wood fiber pulp, synthetic pulp, and the like. These pulps may be used singly or in combination of plural kinds.

In the present invention, it is important to saturate the surface treatment agent from the surface of the paper substrate to a depth of penetration of more than 50 μm, and as long as the aforementioned penetration depth exceeds 50 μm, a paper substrate formed of the various pulps described above can be used. However, in order to make the void structure of the surface layer of the paper substrate uniform, and to quickly and uniformly impregnate the surface treating agent, it is preferred to use a paper substrate formed of hardwood bleached kraft pulp (LBKP). In the conventional paper holder, a paper substrate prepared by blending about 30% of softwood bleached kraft pulp is used, and since the fiber width of the softwood bleached kraft pulp is wide, the surface treatment agent is impeded to smoothly permeate, so in the present invention Preferably, a paper substrate having a softwood kraft pulp content of 20% or less is used, and a bleached kraft pulp containing no softwood is used. The paper substrate is better.

In order to improve the permeability of the surface treatment agent in the surface portion of the paper base material, the hardwood bleached kraft pulp (LBKP) contained in the surface layer preferably has a ratio of the inner cavity width (L1) / the fiber width (L2). Pulp fiber below 0.40. The lower the value of the ratio L1/L2, the more uniform the morphological size of the pulp fibers, and as a result, the voids between the pulp fibers forming the network structure can be made uniform, and the permeability of the surface treatment agent can be improved. If the pulp fibers having an L1/L2 ratio of more than 0.4 are contained in the paper substrate, the pulp fibers having a wide fiber width hinder the penetration of the surface treatment agent. Further, in general, L1/L2 has a stronger fiber-to-fiber bond than a large pulp fiber, and is less likely to produce fine hair, which is a case where a surface treatment agent is not used, and when a surface treatment agent is generally applied as in the present invention, The effect of improving the binding force of the pulp fibers by the treating agent is remarkably high, so that the reinforcing effect of the interfiber bonding force and the fine hair preventing effect by the L1/L2 high pulp fiber are weak. Further, when the L1/L2 ratio is 0.40 or less, the modulus of elasticity of the surface layer of the paper substrate increases, and the peel strength when the cover tape is peeled off from the paper substrate becomes moderate. The pulp having an L1/L2 value of 0.40 or less may be pulp of eucalyptus and acacia, the eucalyptus material including rose bud, willow, blue eucalyptus, etc., and the acacia tree containing meransii tree material. According to the Kajaani fiber length distribution measurement, the content of the short fiber component (which may be referred to as a fine component) having a number average fiber length of 0.1 mm or less in the pulp produced from these materials is 10% or less. The fine composition is small, and the surface treatment agent can be effectively promoted.

The manufacturing apparatus and manufacturing conditions for manufacturing the wafer-type electronic component storage paper holder of the present invention are not particularly limited, and a conventional manufacturing apparatus can be used. The products of the present invention are manufactured in accordance with the manufacturing conditions thereof. For example, the paper-making multi-layer structure paper substrate of the present invention can be subjected to papermaking by a multi-layer combination method using a cylinder paper machine and a long-wire paper machine, and can be added by the above-mentioned internal addition method or coating machine. The required additives are added to the surface layer.

In the multilayer structured paper substrate used in the present invention, various internal additives may be added as needed. For example, natural and synthetic internal glues for paper making such as rosin-based glues, alkyl ketene dimers, alkenyl succinic anhydrides, and the like, as well as various paper strength enhancers, drainage improvers, and polyamines can be used. A water-resistant agent such as a polyamine epichlorohydrin, a filler such as an antifoaming agent or talc, and a dye.

In the paper holder of the present invention, in order to improve the adhesion to the bottom tape and the fine hair preventing effect in the paper substrate, it may also be selected from the group consisting of polyvinyl alcohol, starch, polypropylene decylamine, acrylic resin, styrene- One or more types of the butadiene-based resin, the styrene-isoprene-based resin, the polyester-based resin, the ethylene-vinyl acetate-based resin, the vinyl acetate-vinyl alcohol-based resin, and the urethane-based resin are suitably coated. Inside the paper substrate. Further, as the coating means for the above-mentioned coating agent, for example, a bar coater, a knife coater, an air knife coater, a stick coater, a roll coater (such as a gate roll coater, a size press coater, and a calender coating) can be used. Machine, etc., and double-sided blade coater or roll-to-roller coater.

The amount of the wafer-type electronic component storage paper holder of the present invention (the mass per unit area) is determined by the size of the wafer-type electronic component housed therein, and is generally preferably about 200 to 1000 g/m ² . The papermaking method of the paper substrate having the basis amount in this range is preferably a multi-layer papermaking which is easy to adapt to the desired basis weight. In the paper holder of the present invention, the surface layer impregnated with the surface treatment agent containing the water-soluble polymer is preferably formed in a range of from 50 to 150 g/m ² .

[Examples]

The invention is illustrated in detail by the following examples, but the scope of the invention is not limited to the examples. In addition, values such as blending and concentration are displayed as values based on the solid amount or the mass of the active ingredient. Further, in the whole example, the paper was subjected to pretreatment according to JIS P8111, and the following matters were measured. The measurement conditions for these matters are as follows.

<Method for Measuring the Penetration Depth of Surface Treatment Agents (1)> Applying a surface treatment agent of 2% of a fluorescent dye (Kayahor PBS Liquid manufactured by Nippon Kayaku Co., Ltd.) to a paper holder in a predetermined manner to fluoresce the surface treatment agent in the cut surface of the paper seat Color, the depth of penetration was measured by a microscope.

<Method for Measuring the Penetration Depth of Surface Treatment Agent (2)> A vertical section of the sample was prepared by an ultramicrotome, and the obtained section was subjected to microscopic ATR imaging measurement. The imaging system using the microscopic ATR apparatus Spotlight300 (PerkinElmer Inc.), using the Ge crystal, the decomposition can 8cm ^-1, pixel size 1.56μm angle, accumulated times 2, measurement wavelength region of 4000 ~ 680cm ^-1, measurement area 200 × 150μm ( The penetration depth of the surface treatment agent was measured under the conditions of 128 × 96 pixels.

<Method for Measuring the Penetration Depth of Surface Treatment Agents (3)> The vertical section of the sample was prepared by a vertical slicer, and 10 μl of an iodine-boric acid acetone solution (iodine 0.1%, boric acid saturation) was dropped on the cut surface to cause coloring, and the state of coloring was observed after dripping, and polyvinyl alcohol was measured. Soaking depth.

<Method for Measuring the Penetration Depth of Surface Treatment Agents (4)> Prepare the vertical section of the sample with a vertical slicer and load the 1% iodine solution The beaker was placed on the open side of the beaker and heated at 100 °C. The state of coloration of the cut surface at this time was observed, and the penetration depth of starch was measured.

<Method for measuring smoothness> Two-dimensional surface roughness meter: The center line average surface roughness (Ra) of the open side surface of the concave portion of the test paper substrate or the paper seat (the surface in contact with the cover tape) was measured using a Surfcorder SE-3C (manufactured by Otaru Laboratory). .

<Method for measuring viscosity> The viscosity of the surface treatment agent was measured using a B-type viscometer. The B-type viscometer measures the anti-adhesive torque of the liquid acting on the cylinder and the disc when the cylinder or the disc is rotated in the liquid to visualize the viscosity of the liquid.

<Method for measuring peel strength> The paper holder accommodating the wafer type electronic component was cut into a strip shape of 8 mm wide, and a pocket-shaped recess corresponding to the capacitor wafer size 0603 was formed by press molding according to the Electronic Information Technology Industry Association specification JEITA ET-7103. Nitto Electric Co., Ltd. cover tape (No.318H-14A (trademark), polyethylene terephthalate (PET) and ethylene-vinyl acetate copolymer (EVA) co-extruded laminated film: 5.25 wide Mm, thickness 53 μm) as a cover tape, and using the heat sealing material manufactured by Nitto Denko Co., Ltd.: trademark NST-35, heat sealing temperature 155 ° C, heat sealing pressure applied to the sample 1.5 MPa, 38000 beats (takt) Next, from the side edge covered by the cover tape to the inner side of 0.5 mm, the cover tape was heat-sealed on the surface of the paper seat to have a track shape of 0.4 mm in width and 3.0 mm in interval. After about 1 hour, the peeling strength of the surface of the paper seat and the cover tape was measured according to the method of JIS C 0806-3 (peeling speed 300 mm/min, measurement time 12 seconds, number of test materials n: 10). Degree, and the average value of the measured values is obtained.

<Preventing fine hair production> The state of fine hair generation of the heat seal portion after the peel strength was measured was visually confirmed.

4: Unable to see fluff on the observation surface.

3: 1 to 3 fine hairs can be seen on the observation surface.

2: 4 to 8 fine hairs can be seen on the observation surface.

1: Full fluff can be seen on the observation surface.

Examples 1 and 2

In each of Examples 1 and 2, the surface layer, the middle layer, and the inner layer of the paper substrate were formed by using different pulps. That is, the pulp was decomposed and decomposed into LBKP by 100%, and 400 ml of Canadian Standard Freeness was prepared for the surface layer. At this time, the L1/L2 ratio is = 0.34. The NBKP 20% and LBKP 80% were blended, and the mixture was broken and decomposed to prepare a pulp having a Canadian freeness of 350 ml for the middle layer. Aluminum sulfate was added to the pulp slurry to adjust to pH 6.0, and 0.3% of polyacrylamide (POLSTST-1250 manufactured by Arakawa Chemical Co., Ltd.) was added as an internal paper strength enhancer. Each of the above pulp pulps is supplied to a short-web paper machine, and the floor weight is adjusted into a surface layer: 100 g/m ² , a middle layer: 200 g/m ² , and an inner layer: 50 g/m ² , and papermaking is carried out by a combination method. The obtained three-layer base paper was subjected to a smoothing treatment by a calender placed in a paper machine, and then coated with a surface treatment agent composed of polypropylene decylamine (POLYMERSET-512 (trademark) manufactured by Arakawa Chemical Co., Ltd., molecular weight: 200,000). The liquid was prepared to have a temperature of 60 ° C in the first embodiment, a surface treatment agent concentration of 3.6%, and a viscosity of 6 mPa. s, in Example 2, the surface treatment agent concentration: 5.0%, viscosity: 8 mPa. s, the coating liquid was applied to the base paper, and the coating amount was 0.72 g/m ² in Example 1, and 1.00 g/m ² in Example ² , and both of Examples 1 and 2 were produced in a basis weight of 350 g/ A paper base for a wafer type electronic component storage paper holder having a m ² and a thickness of 0.42 mm. At this time, the penetration depth of the surface treatment agent (method (2) for measuring the penetration depth) was 63 μm in Example 1, and 52 μm in Example 2. 2% of a fluorescent dye (Kayahor PBS Liquid manufactured by Nippon Kayaku Co., Ltd.) was blended in the same surface treatment agent coating liquid as described above, and the depth of penetration of the fluorescent color was measured. As a result, the measured value of the penetration depth was as in Example 1. The middle was 65 μm, and in Example 2, it was 55 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 3.35 μm in Example 1, and 3.22 μm in Example 2.

The paper substrate obtained in each of Examples 1 and 2 was cut into a strip shape having a width of 8 mm, and the following wafer type electronic component housing recess and paper holder transfer hole were simultaneously formed in accordance with JIS C 0806-3 ( The step of the through hole) is to manufacture a wafer type electronic component storage paper holder.

(1) Forming a housing recess The concave portion was formed: an embossing machine (manufactured by Nippon Seiki Co., Ltd., model: AC505S type) and a mold (manufactured by Nippon Kagaku Co., Ltd., model 0603) were used. Recessed shape size: CD direction: 0.66mm MD direction: 0.36mm Depth: 0.66mm bottomed, angled pressed bag

(2) Circular through hole for paper holder transfer: through hole with a diameter of 1.55mm

Example 3

A wafer type electronic component storage paper holder having a basis weight of 350 g/m ² and a thickness of 0.42 mm was produced in the same manner as in the first to second embodiments. Among them, the surface treatment agent coating liquid is polypropylene decylamine (POLYMERSET-512 (trademark) manufactured by Arakawa Chemical Co., Ltd., molecular weight: 200,000), and styrene-maleic acid copolymer resin (POLYMARON-382 (trademark, manufactured by Arakawa Chemical Co., Ltd.) )) The surface treatment agent coating liquid was adjusted to a temperature of 60 ° C, a surface treatment agent concentration of 4.8%, and a viscosity of 7 mPa in a solid mass ratio of 100:4. s, then apply it to the base paper. At this time, the coating amount was a solid amount of polypropylene decylamine: 0.92 g/m ² , and a solid content of the styrene-maleic acid copolymer resin: 0.04 g/m ² . The depth of penetration of the surface treatment agent at this time (measurement method (2) of the penetration depth) was 77 μm. A fluorescent dye (Kayahor PBS Liquid, manufactured by Nippon Kayaku Co., Ltd.) was prepared in the same surface treatment agent coating solution as that described above: 2%, and the penetration depth of the fluorescent color was measured. As a result, the measured value of the penetration depth was 80 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 3.41 μm.

Example 4

A wafer type electronic component storage paper holder was produced in the same manner as in the third embodiment. In the surface treatment agent coating liquid component, an olefin-maleic acid copolymer resin (POLYMARON-482 (trademark) manufactured by Arakawa Chemical Co., Ltd.) is used instead of the styrene-maleic acid copolymer resin, and a surface treatment agent is used. Concentration: 4.6%, viscosity: 7mPa. s coating solution. At this time, the coating amount was 0.89 g/m ² in terms of polypropylene decylamine and 0.04 g/m ^{2 in} terms of olefin-maleic acid copolymer resin. The depth of penetration of the surface treatment agent (method (2) for measuring the penetration depth) at this time was 72 μm. A fluorescent dye (Kayahor PBS Liquid manufactured by Nippon Kayaku Co., Ltd.) was prepared in the same surface treatment agent coating solution as above: 2%, and the penetration depth of the fluorescent color was measured, and the measured value of the penetration depth was 75 μm. Further, the center line average roughness (Ra) of the obtained paper substrate was 3.40 μm.

Example 5

A wafer type electronic component storage paper holder was produced in the same manner as in the third embodiment. In the surface treatment agent coating liquid, polyvinyl alcohol (PVA117 (trademark) manufactured by Kuraray) and styrene-maleic acid copolymer resin (manufactured by Arakawa Chemical Co., Ltd., POLYMARON-382 (trademark)) were used in a solid mass. Ratio of 100:4 ratio mixture, modulation surface treatment agent coating liquid temperature: 60 ° C, surface treatment agent concentration: 4.5%, viscosity: 7 mPa. The coating liquid of s is then applied to the aforementioned thick paper. At this time, the coating amount was 0.86 g/m ² in terms of polyvinyl alcohol and 0.04 g/m ^{2 in} terms of styrene-maleic acid copolymer resin. The depth of penetration of the surface treatment agent (method (2) for measuring the penetration depth) at this time was 73 μm. A fluorescent dye (Kayahor PBS Liquid manufactured by Nippon Kayaku Co., Ltd.) was prepared in the same surface treatment agent coating solution as above: 2%, and the penetration depth of the fluorescent color was measured, and the measured value of the penetration depth was 75 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 3.16 μm.

Example 6

A wafer type electronic component storage paper holder having a basis weight of 350 g/m ² and a thickness of 0.42 mm was produced in the same manner as in the first embodiment. The surface treatment agent for the coating liquid is polyvinyl alcohol (PVA117 (trademark) manufactured by Kuraray), and the preparation temperature is 60 ° C, the polyvinyl alcohol concentration is 3.7%, and the viscosity is 7 mPa. The coating liquid of s is then applied to the base paper. At this time, the coating amount was 0.75 g/m ² in terms of polyvinyl alcohol. The penetration depth of the surface treatment agent was measured by the measurement method (3) of the penetration depth, and as a result, the penetration depth was 55 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 3.30 μm.

Example 7

A wafer type electronic component storage paper holder having a basis weight of 350 g/m ² and a thickness of 0.42 mm was produced in the same manner as in the first embodiment. Among them, the surface treatment agent used starch (Ace K (trademark) made by Prince Cornstarch), and the color temperature was 60 ° C, the starch concentration was 4.2%, and the viscosity was 7 mPa. The coating liquid of s is then applied to the base paper. At this time, the coating amount was 0.70 g/m ² in terms of starch. The depth of penetration was measured by the measurement method (4) and found to be 53 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 3.25 μm.

Comparative example 1

A wafer type electronic component storage paper holder was produced in the same manner as in the second embodiment. Among them, the LBK 100% which is different from the LBKP used in Example 2 was broken and the Canadian freeness: 400 ml of the surface layer pulp was prepared. At this time, the L1/L2 ratio = 0.45. The coating amount of the surface treatment agent was 0.95 g/m ² . The penetration depth (method (2) for measuring the penetration depth) of the surface treatment agent at this time was 38 μm. A fluorescent dye (Kayahor PBS Liquid, manufactured by Nippon Kayaku Co., Ltd.) was added to the same surface treatment agent coating liquid as described above: 2%, and the penetration depth of the fluorescent color was measured. As a result, the measured value of the penetration depth was 40 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 2.93 μm.

Comparative example 2

A wafer type electronic component storage paper holder was produced in the same manner as in the first embodiment. Among them, the surface treatment agent is polypropylene decylamine (manufactured by Arakawa Chemical Co., Ltd., POLYMERSET-512 (trademark), molecular weight: 200,000), and the temperature is 20 ° C. Polyacrylamide concentration: 3.6%, viscosity: 11mPa. The coating liquid of s is then applied to the base paper. The depth of penetration of the surface treatment agent (method of measuring the depth of penetration (2)) at this time was 37 μm. A fluorescent dye (Kayahor PBS Liquid, manufactured by Nippon Kayaku Co., Ltd.) was added to the same surface treatment agent coating liquid as described above: 2%, and the penetration depth of the fluorescent color was measured. As a result, the measured value of the penetration depth was 40 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 2.80 μm.

Comparative example 3

A wafer type electronic component storage paper holder was produced in the same manner as in the third embodiment. The LBKP 100% different from that of Example 3 was broken up, and a pulp having a Canadian freeness of 400 ml was prepared for the surface layer. At this time, the L1/L2 ratio = 0.45. Further, the surface treatment agent is a polypropylene decylamine (manufactured by Arakawa Chemical Co., Ltd., POLYMERSET-512 (trademark), molecular weight: 200,000), and a styrene-maleic acid copolymer resin (manufactured by Arakawa Chemical Co., Ltd., POLYMARON-382 (trademark) )) mixed in a solid content ratio of 100:4, to prepare the coating liquid temperature: 60 ° C, surface treatment agent concentration: 4.8%, viscosity: 7 mPa. The coating liquid of s is then applied to the base paper. The coating amount at this time was 0.90 g/m ² in terms of polypropylene decylamine and 0.04 g/m ^{2 in} terms of styrene-maleic acid copolymer resin. The depth of penetration of the surface treatment agent (method for measuring the depth of penetration (2)) was 45 μm. A fluorescent dye (Kayahor PBS Liquid, manufactured by Nippon Kayaku Co., Ltd.) was prepared in the same amount of the surface treatment agent coating liquid as described above: 2%, and the penetration depth of the fluorescent color was measured. As a result, the measured value of the penetration depth was 48 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 2.89 μm.

Comparative example 4

A wafer type electronic component storage paper holder was produced in the same manner as in the third embodiment. Among them, a surface treatment agent is a polypropylene decylamine (manufactured by Arakawa Chemical Co., Ltd., POLYMERSET-512 (trademark), molecular weight: 200,000), and a styrene-maleic acid copolymer resin (manufactured by Arakawa Chemical Co., Ltd., POLYMARON-382 ( Trademark)) Mixing in a ratio of solid content ratio of 100:4, adjusting surface treatment agent concentration: 6.0%, viscosity: 11 mPa. The coating liquid of s is then applied to the base paper. The coating amount at this time was 1.11 g/m ² in terms of polypropylene decylamine and 0.04 g/m ^{2 in} terms of styrene-maleic acid copolymer resin. The penetration depth (method (2) for measuring the penetration depth) of the surface treatment agent at this time was 38 μm. A fluorescent dye (Kayahor PBS Liquid, manufactured by Nippon Kayaku Co., Ltd.) was added to the same surface treatment agent coating liquid as described above: 2%, and the penetration depth of the fluorescent color was measured. As a result, the measured value of the penetration depth was 40 μm. Further, the center line average roughness (Ra) of the obtained paper substrate was 2.78 μm.

Comparative Example 5

The surface layer, the middle layer, and the inner layer of the paper substrate are formed by different pulps. That is, in the surface layer, NBKP 30% and LBKP 70% were mixed and broken, and a Canadian freeness: 400 ml of pulp was used. At this time, the L1/L2 ratio of LBKP is = 0.34. In the middle layer, NBKP 20%, LBKP 20%, 20% old paper and 40% old newspaper were prepared, and the Canadian freeness: 350 ml pulp was prepared. In the inner layer, NBKP 25%, LBKP 25%, and old newspaper 50% were prepared, and the Canadian Standard Freeness: 350 ml pulp was prepared. Aluminum sulfate was added to the pulp slurry in each layer, and the pH was adjusted to 6.0, and polypropylene decylamine (POLYSTRON-1250, manufactured by Arakawa Chemical Industry Co., Ltd.) was added: 0.3% as an internal paper strength enhancer, and the obtained pulp was obtained. The slurry is supplied to a short-web paper machine, and the surface layer is 100 g/m ² , the middle layer is 200 g/m ² , and the inner layer is 500 g/m ^{2 to} form each layer of base paper, which is then subjected to a calender set in a paper machine. After the smoothing treatment, polypropylene decylamine (PS117 manufactured by Arakawa Chemical Co., Ltd., molecular weight: 400,000) and styrene-maleic acid copolymer resin (manufactured by Arakawa Chemical Co., Ltd., POLYMARON-382 (trademark)) were used at a ratio of 100:4. Proportioned mixture, prepared into coating liquid temperature: 20 ° C, surface treatment agent concentration: 4.8%, viscosity: 11 mPa. The coating liquid of s was then applied to the base paper at a time when the coating amount was 0.88 g/m ² in terms of polypropylene decylamine and 0.02 g/m ^{2 in} terms of styrene-maleic acid copolymer resin. The depth of penetration of the surface treatment agent (method (2) for measuring the penetration depth) at this time was 42 μm. A fluorescent dye (Kayahor PBS Liquid manufactured by Nippon Kayaku Co., Ltd.) was prepared in the same surface treatment agent coating solution as above: 2%, and the penetration depth of the fluorescent color was measured, and the measured value of the penetration depth was as in Example 1. The medium is 45 μm. Further, the center line average roughness (Ra) of the surface of the obtained paper substrate was 2.97 μm.

The measurement results of the surface layer L1/L2 ratio, the concentration of the surface treatment agent, the viscosity, the penetration depth, the center line average roughness (Ra) of the paper substrate, the smoothness, the peel strength, and the fine hair generation state of the above examples and comparative examples are shown. In Table 1.

As is clear from Table 1, even if the peeling strength is strong, the wafer-type electronic component storage paper holders of Examples 1 to 7 of the present invention do not generate fine hair. In the wafer-type electronic component storage paper holder of the present invention, when the cover tape for sealing the opening of the electronic component housing recess is peeled off from this point, fine hair is not generated or rarely generated, and therefore, the wafer type accommodated in the concave portion is obtained. Electronic parts are not contaminated by fine hair, and when the wafer is taken out by the placement machine, the nozzle is not blocked by fine hair.

Industrial use possibility

The electronic component of the wafer type electronic component storage paper holder of the present invention is not contaminated by the fine hair generated in the place, and does not block the nozzle of the placement machine, so that it has a high practical effect.

Claims (3)

A wafer type electronic component storage paper holder comprising a paper substrate and a plurality of concave portions formed on the paper substrate for accommodating the wafer type electronic component, wherein the paper substrate has a plurality of layers including a surface layer, a middle layer and an inner layer a paperboard structure, wherein a surface of the concave side of the substrate is coated with a surface treatment agent; the surface treatment agent contains at least one water-soluble polymer selected from the group consisting of polyvinyl alcohol, starch, and polypropylene decylamine, and With adjustment to 4~10mPa. The viscosity of s; the coating amount of the surface treatment agent is 0.1 to 1.1 g / m ² ; the coated surface treatment agent is soaked from the surface to a depth of 50 to 100 μm in the paper substrate; The center line roughness (Ra) of the opening side surface of the concave portion of the substrate is adjusted to be 3 μm to 6 μm. The wafer type electronic component storage paper holder according to the first aspect of the invention, wherein the surface treatment agent contains the water-soluble polymer and contains a styrene-maleic acid copolymer resin or an olefin-maleic acid copolymer. Resin. The wafer type electronic component storage paper holder of claim 1, wherein the pulp fiber forming the surface layer of the paper substrate is a hardwood kraft pulp, and the ratio of the inner cavity width (L1) / the fiber width (L2) is 0.4 or less.