JP2019165098A - Method for manufacturing wiring board and method for manufacturing integrated circuit - Google Patents

Abstract

To prevent a reduction in quality of a wiring board compared with a case where a foil is formed on a toner image using a toner in which the volume fraction of particles having a particle diameter of 16 μm or more is 1% or more.SOLUTION: A method for manufacturing a wiring board includes: a preparation step of preparing a substrate on which a toner image is formed using a toner in which the volume fraction of particles having a particle diameter of 16 μm or more is less than 1%; and a foil formation step of forming a foil on the toner image with respect to the substrate.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for manufacturing a wiring board and a method for manufacturing an integrated circuit.

In Patent Document 1, the transferred transfer foil is laminated on the recording base material on which the foil adhering resin layer is formed in contact with the surface of the foil adhering resin layer. It is described that the conductive foil is bonded to the foil bonding resin layer by being heated and naturally cooled after passing through the pressure contact portion of the foil transfer roller.
In Patent Document 2, a transfer body is pressed against an electrostatic latent image carrier at a linear pressure of 250 gf / cm to transfer a copper powder pattern, and the transfer body is heated to 150 ° C. for 60 minutes after transferring to transfer the adhesive layer. It is described that a printed circuit board having an electric circuit is produced by this work, which is cured and has insoluble and infusible heat resistance.
Patent Document 3 describes that a release sheet on which a conductive circuit formation pattern is formed can be created by forming a conductive circuit formation pattern using a known electrophotographic method using toner on the release surface of the release sheet. ing.

JP 2013-15953 A JP 2011-238837 A JP 2004-95648 A

When a wiring board is manufactured by forming a foil on a substrate, a foil may be formed on the toner image with respect to the substrate on which the toner image is formed. Here, depending on the size of the particles contained in the toner of the toner image formed on the substrate, for example, between a part of the wiring formed by the foil on the toner image and the other part. The quality of the wiring board may be deteriorated, such as a short circuit.
An object of the present invention is to suppress the deterioration of the quality of a wiring board compared to the case where a foil is formed on a toner image of a toner having a particle volume ratio of 16 μm or more and a volume fraction of particles of 1% or more. It is in.

The invention according to claim 1 is a preparation step of preparing a substrate on which a toner image of a toner having a volume fraction of particles having a particle diameter of 16 μm or more is less than 1%, And a foil forming step of forming a foil on the toner image.
According to a second aspect of the present invention, the toner image is a plastic toner image having plasticity. In the foil forming step, the substrate is pressed by pressing the foil against the substrate at a temperature of 70 ° C. or less. The method for manufacturing a wiring board according to claim 1, wherein the foil is formed on the plastic toner image.
The invention described in claim 3 is characterized in that the plastic toner of the plastic toner image is a pressure-sensitive toner whose viscosity decreases when pressed against the foil at a temperature of 70 ° C. or lower. It is a manufacturing method of a wiring board.
According to a fourth aspect of the present invention, the pressure-sensitive toner includes a first resin and a second resin having different glass transition temperatures, and the first resin and the second resin are phase-separated. The method of manufacturing a wiring board according to claim 3.
According to a fifth aspect of the present invention, the pressure-sensitive toner has a core-shell structure having a core part in which the first resin and the second resin are phase-separated and a covering part that covers the core part. The method of manufacturing a wiring board according to claim 4.
In the invention according to claim 6, the first resin has a glass transition temperature higher than that of the second resin, and the total amount of the mass part of the first resin is the mass part of the second resin. 6. The method of manufacturing a wiring board according to claim 5, wherein the total amount is greater than the total amount of
The invention according to claim 7 is the method for manufacturing a wiring board according to claim 6, wherein the pressure-sensitive toner satisfies the following formula (1).
20 ° C. ≦ T (1 MPa) −T (10 MPa) Formula (1)
(In Formula (1), T (1 MPa) indicates the temperature at which the viscosity of the pressure-sensitive toner becomes 10 ⁴ Pa · s at an applied pressure of 1 MPa, and T (10 MPa) indicates the pressure-sensitive pressure at an applied pressure of 10 MPa. (Indicates the temperature when the viscosity of the toner reaches 10 ⁴ Pa · s)
According to an eighth aspect of the present invention, in the foil forming step, the foil is pressed against and pressed against a region wider than a region where the toner image is formed in the substrate. The method for manufacturing a wiring board according to claim 1, wherein the foil is formed on the toner image.
The invention according to claim 9 is the foil forming step, wherein the film-like foil formed integrally is pressed against the substrate and pressed, so that the foil is placed on the toner image against the substrate. 9. The method for manufacturing a wiring board according to claim 8, wherein the wiring board is formed.
According to a tenth aspect of the present invention, in the foil forming step, a foil holding portion that holds a plurality of powdery foils is pressed against the substrate and pressed against the substrate on the toner image. 9. The method for manufacturing a wiring board according to claim 8, wherein the foil is formed.
The invention described in claim 11 is an integrated circuit including a wiring board preparation step for preparing the wiring substrate according to any one of claims 1 to 10 and a mounting step for attaching a semiconductor element to the wiring substrate. A circuit manufacturing method.

According to the first aspect of the present invention, the quality of the wiring board is reduced as compared with the case where a foil is formed on a toner image of a toner having a particle size of 16 μm or more and a volume fraction of particles of 1% or more. Can be suppressed.
According to the invention of claim 2, the quality of the wiring board is higher than that in the case where the foil is pressed on the substrate at a temperature higher than 70 ° C. and pressed against the substrate to form the foil on the toner image. The decrease can be further suppressed.
According to the invention of claim 3, the foil can be formed on the plastic toner image against the substrate by pressing the foil against the substrate at a temperature of 70 ° C. or less.
According to the invention of claim 4, when the pressure-sensitive toner is pressurized at a temperature of 70 ° C. or lower, the viscosity of the pressure-sensitive toner is lower than when the first resin and the second resin are not phase-separated. It becomes easy to do.
According to the fifth aspect of the present invention, the pressure-sensitive toners are less likely to agglomerate than the case where the first resin and the second resin are phase-separated at the surface of the pressure-sensitive toner.
According to the sixth aspect of the present invention, the pressure-sensitive toner in the covering portion is greater than the case where the total amount of the resin mass part having the lower glass transition temperature is larger than the total mass part of the resin having the higher glass transition temperature. Becomes strong against pressure stress.
According to the seventh aspect of the present invention, when the pressure-sensitive toner is pressurized at a temperature of 70 ° C. or lower, the viscosity of the pressure-sensitive toner is more likely to decrease than when the pressure-sensitive toner does not satisfy the formula (1). Become.
According to the invention of claim 8, the foil is formed on the plastic toner image with respect to the substrate as compared with the case where the foil is pressed against a region narrower than the region where the plastic toner image is formed on the substrate. The configuration necessary to do this is simplified.
According to the ninth aspect of the present invention, it is possible to suppress the occurrence of a portion where the foil is not formed on the plastic toner image with respect to the substrate as compared with the case where the plurality of foils formed separately are formed on the substrate. be able to.
According to the invention of claim 10, the amount of foil used for forming the next foil among the foils not formed on the substrate is increased as compared with the case where the integrally formed foil is formed on the substrate.
According to the invention of claim 11, the quality of the wiring board is reduced as compared with the case where a foil is formed on a toner image of a toner having a particle volume of 16 μm or more and a volume fraction of particles of 1% or more. Can be suppressed.

1 is a schematic configuration diagram illustrating an image forming apparatus according to an exemplary embodiment. It is the figure which showed the structure of foil. It is a block diagram of a foil formation part. It is the flowchart explaining the manufacturing method of the wiring board. It is the figure which showed the foil formation part as a modification. It is the figure which showed the board | substrate used for evaluation of the presence or absence of a short circuit. It is the figure which showed the integrated circuit used for operation | movement evaluation of a semiconductor element. It is the figure which showed the wiring board used for insulation evaluation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<Description of Image Forming Apparatus>
FIG. 1 is a schematic configuration diagram illustrating an image forming apparatus 1 according to the present embodiment.
An image forming apparatus 1 shown in FIG. 1 is a so-called tandem color printer, and an image forming unit 10 that forms an image on a sheet P as an example of a substrate based on image data, and the operation of the entire image forming apparatus 1. A control unit 50 that executes control, communication with, for example, a personal computer, image processing performed on image data, and the like, and a user interface unit 30 that receives operation input from the user and displays various information to the user. I have. In addition, the image forming apparatus 1 includes a pressure-sensitive toner image forming unit 70 that forms a pressure-sensitive toner image on the paper P by using a pressure-sensitive toner as an example of a plastic toner having plasticity, and a sensitivity to the paper P. And a foil forming unit 80 for forming a foil on the pressure toner image.

<Description of Image Forming Unit>
The image forming unit 10 is a functional unit that forms an image by, for example, electrophotography, and includes a yellow (Y) image forming unit 11Y, a magenta (M) image forming unit 11M, and a cyan (C) image forming unit 11C. , And black (K) image forming units 11K.
In the following description, when the image forming units are described without being distinguished from each other, they are collectively referred to as “image forming unit 11”.

  Each image forming unit 11 includes, for example, a photosensitive drum 12 on which an electrostatic latent image is formed and each color toner image is formed thereafter, and a charger 13 that charges the surface of the photosensitive drum 12 with a predetermined potential. An exposure unit 14 that exposes the photosensitive drum 12 charged by the charger 13 based on image data; a developing unit 15 that develops the electrostatic latent image formed on the photosensitive drum 12 with each color toner; and a transfer unit. And a cleaner 16 for cleaning the surface of the subsequent photosensitive drum 12. Each image forming unit 11 is configured in substantially the same manner except for the toner stored in the developing device 15.

The image forming unit 10 also transfers the transfer belt 20 to which each color toner image formed on the photosensitive drum 12 of each image forming unit 11 is transferred, and each color toner image formed by each image forming unit 11 to the transfer belt. And a primary transfer roll 21 that performs transfer (primary transfer) to 20. Further, a secondary transfer roll 22 that collectively transfers (secondary transfer) each color toner image transferred and superimposed on the transfer belt 20 to the sheet P, and a sheet P on which each color toner image is formed is heated and pressurized. And a fixing unit 60 for thermally fixing the color toner images on P. In the present embodiment, the toner of the toner image fixed on the paper P by the heat fixing process of the fixing unit 60 is referred to as a heat fixing toner. The heat fixing toner has a reduced viscosity when heated.
In the present embodiment, an area where the secondary transfer roll 22 is disposed and each color heat fixing toner image on the transfer belt 20 is secondarily transferred to the paper P is referred to as a secondary transfer area 23.

<Description of image forming operation>
Next, a basic image forming operation in the image forming apparatus 1 according to the present embodiment will be described.
Each of the image forming units 11 of the image forming unit 10 forms yellow, magenta, cyan, and black color heat-fixed toner images by an electrophotographic process using the above-described functional members. Each color heat-fixed toner image formed by each image forming unit 11 is sequentially primary-transferred onto the transfer belt 20 by the primary transfer roll 21 to form a composite toner image on which each color heat-fixed toner is superimposed. The synthetic toner image on the transfer belt 20 is conveyed to the secondary transfer region 23 where the secondary transfer roll 22 is arranged as the transfer belt 20 moves (in the direction of the arrow).

In the recording medium conveyance system, the paper P fed from the recording medium container 40 by the feeding roll is conveyed along the conveyance path and reaches the secondary transfer region 23. In the secondary transfer region 23, the composite toner image held on the transfer belt 20 is secondarily transferred onto the paper P collectively by the transfer electric field formed by the secondary transfer roll 22.
Thereafter, the sheet P on which the image is formed is separated from the transfer belt 20 and conveyed to the fixing unit 60 along the conveyance path. The image (heat-fixed toner image) on the paper P conveyed to the fixing unit 60 is fixed on the paper P by being subjected to a fixing process by the fixing unit 60.

  In this embodiment, a pressure-sensitive toner image is formed on the paper P on which the heat-fixed toner image is formed. Then, a foil as a wiring is pressed against the paper P on which the pressure-sensitive toner image is formed at a temperature of 70 ° C. or less to adhere the foil to the pressure-sensitive toner. By forming, a wiring board is manufactured.

<Description of Pressure Sensitive Toner Image Forming Unit>
The pressure-sensitive toner image forming unit 70 includes a pressure-sensitive toner image forming unit 71 that is a functional unit that forms a pressure-sensitive toner image by, for example, electrophotography. The pressure-sensitive toner image forming unit 71 is configured in substantially the same manner as each image forming unit 11 of the image forming unit 10 except that pressure-sensitive toner is accommodated. The pressure-sensitive toner image forming unit 70 includes a pressure-sensitive toner image transfer roll 72 that transfers the pressure-sensitive toner image formed on the pressure-sensitive toner image forming unit 71 to the paper P.

<Configuration of pressure-sensitive toner>
Next, the configuration of the pressure sensitive toner will be described.
In this embodiment, a pressure-sensitive toner having a volume fraction of pressure-sensitive toner particles having a particle diameter of 16 μm or more and less than 1% is used. Here, the particle size means a volume average particle size. The volume fraction of pressure-sensitive toner particles having a particle diameter of 16 μm or more is the pressure-sensitive toner particles having a particle diameter of 16 μm or more out of the total volume of each pressure-sensitive toner particle constituting the pressure-sensitive toner. It means the ratio of the total volume in.

In a wiring board, a plurality of linear wirings may be provided in parallel at narrow intervals (for example, 1 mm intervals). On the other hand, when a linear pressure-sensitive toner image is formed on a substrate using pressure-sensitive toner having a large proportion of particles having a large particle size, the width of the pressure-sensitive toner image may vary. Further, when the width of the pressure-sensitive toner image varies, the width of the foil formed as a wiring on the pressure-sensitive toner image with respect to the substrate also varies. In such a case, by forming a foil on each of the plurality of linear pressure-sensitive toner images with respect to the substrate to produce a wiring substrate in which a plurality of wirings are arranged in parallel at a narrow interval, the interval between adjacent wirings is obtained. Variation may occur, and in some cases, a short circuit may occur between the wires.
Further, when the ratio of the pressure-sensitive toner particles having a large particle size increases, the size of the pressure-sensitive toner particles contained in the pressure-sensitive toner becomes non-uniform. In this case, when the foil is pressed against the substrate on which the pressure-sensitive toner image is formed, the pressure-sensitive toner particles having a large particle diameter are easily pressed against the foil and receive high pressure from the foil, while the pressure-sensitive toner particles having a large particle diameter The pressure-sensitive toner particles having a small particle size around are difficult to be pressed by the foil, and the pressure received from the foil is small. For this reason, the foil may not be bonded to a portion of the pressure-sensitive toner that receives a small pressure from the foil, which may cause disconnection of the wiring.
That is, when pressure sensitive toner having a large proportion of particles having a large particle diameter is used in the production of the wiring board, the quality of the wiring board may be deteriorated.

On the other hand, when a linear pressure-sensitive toner image is formed on a substrate using a pressure-sensitive toner with a small proportion of particles having a large particle size, the variation in the width of the pressure-sensitive toner image is reduced. On the other hand, variation in the width of the foil formed on the pressure-sensitive toner image is also reduced. Therefore, when forming a wiring board in which a plurality of wirings are arranged in parallel at narrow intervals by forming a foil on the pressure-sensitive toner image having a plurality of linear shapes with respect to the substrate, variations in the spacing between adjacent wirings are produced. And the occurrence of a short circuit between the wires is suppressed.
Further, when the ratio of the pressure-sensitive toner particles having a large particle size is small, the size of the pressure-sensitive toner particles contained in the pressure-sensitive toner becomes nearly uniform. In this case, when the foil is pressed against the substrate on which the pressure-sensitive toner image is formed, a part of the pressure-sensitive toner is restrained from receiving pressure from the foil intensively, and the pressure-sensitive toner receives pressure almost uniformly. It becomes like this. Therefore, the portion of the pressure-sensitive toner where the foil is difficult to adhere is reduced, and the occurrence of disconnection of the wiring is suppressed.
That is, when pressure sensitive toner with a small proportion of particles having a large particle diameter is used in the production of the wiring board, deterioration of the quality of the wiring board is suppressed.

The pressure-sensitive toner used in the present embodiment may be a color toner containing a colorant or a transparent toner (clear toner), but is preferably a transparent toner. When a transparent color toner is used as the pressure-sensitive toner, when the foil is formed on the pressure-sensitive toner image on the paper P, the color of the pressure-sensitive toner image can be seen through when the user looks at the foil. Is suppressed. In the present embodiment, the term “transparent” means that it is at least transparent to visible light. The transparent toner of this embodiment does not substantially contain a colorant. “Substantially free” means that the degree of coloring cannot be confirmed with the naked eye.
In this embodiment, a pressure-sensitive toner having insulating properties is used.

The pressure-sensitive toner contains a binder resin. Further, the pressure-sensitive toner may contain a releasing agent, may contain an internal additive, or may contain an external additive.
The pressure-sensitive toner used in the present embodiment has a reduced viscosity when pressed at a temperature of 70 ° C. or lower. In other words, the viscosity of the pressure-sensitive toner according to the present embodiment decreases when the pressure-sensitive toner is pressurized without being heated.

(Binder resin)
The binder resin is a resin that binds the pressure-sensitive toner to the paper P by adhering to the paper P. Further, when the binder resin is pressed against the foil, the binder resin adheres to the foil, thereby bonding the foil to the pressure-sensitive toner.
The pressure-sensitive toner used in this embodiment contains two types of binder resins having different glass transition temperatures (Tg). Hereinafter, of the two types of binder resins, a binder resin having a higher glass transition temperature is referred to as a high Tg resin, and a binder resin having a lower glass transition temperature is referred to as a low Tg resin. The high Tg resin is an example of the first resin, and the low Tg resin is an example of the second resin.

  The temperature difference between the glass transition temperature of the high Tg resin and the glass transition temperature of the low Tg resin is preferably 30 ° C. or higher, and more preferably 35 ° C. or higher. When the temperature difference between the glass transition temperature of the high Tg resin and the glass transition temperature of the low Tg resin is 30 ° C. or more, the viscosity of the pressure sensitive toner decreases when the pressure sensitive toner is pressurized without heating. It becomes easy to do.

The pressure-sensitive toner contains 5 to 70 parts by mass of the high Tg resin when the total of the mass part of the high Tg resin and the mass part of the low Tg resin contained in the pressure-sensitive toner is 100 parts by mass. It is more preferable that 10 parts by mass or more and 60 parts by mass or less are included, and more preferably 20 parts by mass or more and 50 parts by mass or less.
When the pressure-sensitive toner contains 5 to 70 parts by mass of high Tg resin, the viscosity of the pressure-sensitive toner tends to decrease when the pressure-sensitive toner is pressurized without being heated.

The glass transition temperature of the high Tg resin is preferably 40 ° C. or higher and lower than 60 ° C., more preferably 45 ° C. or higher and lower than 55 ° C.
When the glass transition temperature of the high Tg resin is 40 ° C. or higher, the property of the pressure-sensitive toner and the deformation of the pressure-sensitive toner are suppressed during storage of the pressure-sensitive toner.
When the glass transition temperature of the high Tg resin is less than 60 ° C., the pressure-sensitive toner tends to have a reduced viscosity when the pressure-sensitive toner is pressurized without being heated.

The glass transition temperature of the low Tg resin is preferably less than 10 ° C, more preferably from -100 ° C to less than 10 ° C, and further preferably from -80 ° C to less than 10 ° C.
When the glass transition temperature of the low Tg resin is less than 10 ° C., the viscosity of the pressure-sensitive toner tends to decrease even when the pressure applied to the pressure-sensitive toner is low.

Further, the high Tg resin and the low Tg resin contained in the pressure-sensitive toner used in this embodiment are phase-separated. In this case, the pressure sensitive toner has baroplastic properties. The baroplastic property is a property that the viscosity of the toner tends to decrease when the toner is pressurized without being heated. In other words, the baroplastic property is a property that the toner is easily deformed and flows by pressurization.
The structure in which the high Tg resin and the low Tg resin are phase-separated includes a structure in which a block copolymer of a high Tg segment and a low Tg segment is formed, and a core shell structure in which the high Tg resin and the low Tg resin are formed. The structure etc. which form are mentioned. The high Tg segment is a portion containing a high Tg resin in the block copolymer. The low Tg segment is a portion containing a low Tg resin in the block copolymer.

The connection form of the high Tg segment and the low Tg segment of the block copolymer is not particularly limited. As the block copolymer, when the high Tg segment is A and the low Tg segment is B, for example, AB type, ABA type, BAB type, (AB) _n type, (AB) _n A type, B (AB) _n Examples thereof include block copolymers such as molds.
Examples of the binder resin that forms the block copolymer include addition polymerization resins and polycondensation resins.

The pressure-sensitive toner having a core-shell structure preferably has a core portion (core portion) in which a high Tg resin and a low Tg resin are phase-separated and a covering portion (shell portion) covering the core portion.
The core part may contain a release agent or an internal additive.
Examples of the binder resin that forms the core-shell structure include addition polymerization resins and polycondensation resins.

When the high Tg resin and the low Tg resin are phase-separated on the surface of the pressure-sensitive toner, the viscosity of the pressure-sensitive toner may be lowered even when a low pressure is applied to the pressure-sensitive toner. is there. In this case, the pressure-sensitive toner may be aggregated due to the external force of the pressure-sensitive toner stored in the pressure-sensitive toner image forming unit 71.
On the other hand, when the pressure-sensitive toner is coated with a portion where the high Tg resin and the low Tg resin are phase-separated, the pressure-sensitive toner is deformed when a low pressure is applied to the pressure-sensitive toner. It is suppressed. In this case, generation of aggregated particles or blocking between pressure-sensitive toners during storage and use is less likely to occur.

The core of the pressure-sensitive toner preferably includes 50 parts by mass of the high Tg resin and the low Tg resin when the total of the mass part of the high Tg resin and the mass part of the low Tg resin is 100 parts by mass. .
When the core portion contains 50 parts by mass of high Tg resin and low Tg resin, pressure sensitive toner is applied when pressure greater than a predetermined size (for example, pressure of 1 MPa or more) is applied to the pressure sensitive toner. Viscosity is likely to decrease.

The pressure-sensitive toner covering portion preferably contains more high Tg resin than low Tg resin when the total of the mass part of the high Tg resin and the mass part of the low Tg resin is 100 parts by mass. It is more preferable that 100 parts by mass of Tg resin is contained and no low Tg resin is contained. In the covering portion, the fact that the total amount of the mass part of the high Tg resin is larger than the total amount of the mass part of the low Tg resin includes that the covering portion has the high Tg resin and does not have the low Tg resin.
When the covering portion contains more high Tg resin than low Tg resin, the viscosity of the pressure-sensitive toner is difficult to decrease when a low pressure is applied to the pressure-sensitive toner. For this reason, the pressure-sensitive toner contained in the pressure-sensitive toner image forming unit 71 is suppressed from adhering to the pressure-sensitive toner image forming unit 71 due to receiving an external force or the like. That is, the pressure-sensitive toner becomes strong against pressure stress.

Examples of the binder resin include addition polymerization resins and polycondensation resins.
The addition polymerization type resin is a polymer produced by polymerization of a monomer having an ethylenically unsaturated double bond. Examples of the monomer include styrenes (for example, styrene, parachlorostyrene, α-methylstyrene, etc.), (meth) acrylic acid esters (for example, methyl acrylate, ethyl acrylate, propyl acrylate, acrylic Butyl acrylate, lauryl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, lauryl methacrylate, 2-ethylhexyl methacrylate), (meth) acrylonitriles (Eg, acrylonitrile, methacrylonitrile, etc.), ethylenically unsaturated carboxylic acids (eg, acrylic acid, methacrylic acid, crotonic acid, etc.), vinyl ethers (eg, vinyl methyl ether, vinyl isobutyl ether, etc.), vinyl Ton (such as vinyl methyl ketone, vinyl ethyl ketone, vinyl isopropenyl ketone), olefins (e.g., isoprene, butene, butadiene, etc.) and the like, include β- carboxyethyl acrylate. Among these monomers, homopolymers produced by polymerization of one monomer, copolymers produced by copolymerization of two or more monomers, homopolymers and copolymers of these monomers Any of the mixtures may be used as an addition polymerization resin.
Note that (meth) acrylic acid and (meth) acrylonitrile include acrylic acid and methacrylic acid.

The addition polymerization type resin may contain an acidic polar group, a basic polar group, or an alcoholic hydroxyl group.
Examples of the acidic polar group include a carboxy group, a sulfonic acid group, and an acid anhydride.

Examples of basic polar groups include amino groups, amide groups, hydrazide groups, and the like.
Among the monomers contained in the addition polymerization type resin, examples of the monomer having a basic polar group include a monomer having a nitrogen atom. As the monomer having a nitrogen atom, it is preferable to use a (meth) acrylic acid amide compound, a (meth) acrylic acid hydrazide compound, or a (meth) acrylic acid aminoalkyl compound.

Examples of the (meth) acrylic acid amide compound include acrylic acid amide, methacrylic acid amide, acrylic acid methylamide, methacrylic acid methylamide, acrylic acid dimethylamide, acrylic acid diethylamide, acrylic acid phenylamide, and acrylic acid benzylamide. .
Examples of the (meth) acrylic acid hydrazide compound include acrylic acid hydrazide, methacrylic acid hydrazide, acrylic acid methyl hydrazide, methyl methacrylate hydrazide, acrylic acid dimethyl hydrazide, acrylic acid phenyl hydrazide and the like.
Examples of the (meth) acrylic acid aminoalkyl compound include 2-aminoethyl acrylate, 2-aminoethyl methacrylate, 2- (diethylamino) ethyl (meth) acrylate, and the like. The (meth) acrylic acid aminoalkyl compound may be a (meth) acrylic acid monoalkylaminoalkyl compound or a (meth) acrylic acid dialkylaminoalkyl compound.

  Of the monomers contained in the addition polymerization type resin, as the monomer having an alcoholic hydroxyl group, for example, hydroxy (meth) acrylates are preferably used. Examples of hydroxy (meth) acrylates include 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and the like.

A chain transfer agent may be used for the polymerization of the addition polymerization type resin.
Although it does not specifically limit as a chain transfer agent, For example, the compound which has a thiol component is mentioned. Examples of the compound having a thiol component include mercaptans. Among the mercaptans, alkyl mercaptans such as hexyl mercaptan, heptyl mercaptan, octyl mercaptan, nonyl mercaptan, decyl mercaptan, dodecyl mercaptan are preferable.

The addition polymerization type resin may be a crosslinked resin to which a crosslinking agent is added. As a crosslinking agent, the polyfunctional monomer which has a 2 or more ethylenically unsaturated group in a molecule | numerator is mentioned, for example.
Examples of the polyfunctional monomer include aromatic polyvinyl compounds (for example, divinylbenzene, divinylnaphthalene, etc.), polyvinyl esters of aromatic polycarboxylic acid (for example, divinyl phthalate, divinyl isophthalate, Divinyl terephthalate, divinyl homophthalate, divinyl trimesate / trivinyl, divinyl naphthalenedicarboxylate, divinyl biphenylcarboxylate, etc.) divinyl esters of nitrogen-containing aromatic compounds (eg divinyl pyridinedicarboxylate) unsaturated heterocyclic compound carboxylic Vinyl esters of acids (eg, vinyl pyromumate, vinyl furan carboxylate, vinyl pyrrole-2-carboxylate, vinyl thiophene carboxylate), (meth) acrylic acid esters of linear polyhydric alcohols (eg, butanediol) Methacryle , Hexanediol acrylate, octanediol methacrylate, decanediol acrylate, dodecanediol methacrylate, etc.), (meth) acrylic acid esters of polyhydric alcohols having a branched structure or a substituent (for example, neopentyl glycol dimethacrylate, 2- Hydroxy-1,3-diacryloxypropane etc.), polypropylene polyethylene glycol di (meth) acrylates (eg polyethylene glycol di (meth) acrylate etc.), polyvinyl esters of polycarboxylic acids (eg divinyl succinate) , Divinyl fumarate, vinyl / divinyl maleate, divinyl diglycolate, vinyl itaconate / divinyl, divinyl acetone dicarboxylate, divinyl glutarate, dibi 3,3′-thiodipropionate Le, trans- aconitic acid divinyl / trivinyl, divinyl adipate, pimelic acid divinyl, divinyl suberate, azelate, divinyl sebacate, divinyl dodecanedioate divinyl, brassylic acid divinyl like). Among these crosslinking agents, one type may be used alone, or two or more types may be used in combination.

Among the above-mentioned crosslinking agents, (meth) acrylic acid esters of linear polyhydric alcohols (for example, butanediol methacrylate, hexanediol acrylate, octanediol methacrylate, decanediol acrylate, dodecanediol methacrylate, etc.), branched structures or substituents (Meth) acrylic acid esters (for example, neopentyl glycol dimethacrylate, 2-hydroxy-1,3-diacryloxypropane, etc.) of polyhydric alcohols having polypropylene, and polypropylene polyethylene glycol di (meth) acrylates (for example, polyethylene) It is preferable to use glycol di (meth) acrylate or the like.
The content of the crosslinking agent is preferably 0.05% by mass or more and 5% by mass or less, and more preferably 0.1% by mass or more and 1.0% by mass or less with respect to the total amount of monomers contained in the addition polymerization resin.

The addition polymerization type resin may be produced by radical polymerization using a radical polymerization initiator. It does not specifically limit as a radical polymerization initiator, A well-known radical polymerization initiator is mentioned.
The amount of the radical polymerization initiator used is preferably 0.01% by mass or more and 15% by mass or less, and more preferably 0.1% by mass or more and 10% by mass or less based on the total amount of monomers contained in the addition polymerization resin.

The weight average molecular weight of the addition polymerization type resin is preferably from 1,500 to 60,000, and more preferably from 3,000 to 40,000.
In addition, a weight average molecular weight (Mw) and a number average molecular weight (Mn) are measured using a gel permeation chromatography (GPC). For the molecular weight measurement by GPC, GPC · HLC-8120GPC, TSKgel SuperHM-M (15 cm) manufactured by Tosoh Corporation is used as a measuring device, and the measurement is performed in a THF solvent. From this measurement result, a weight average molecular weight and a number average molecular weight are calculated using a molecular weight calibration curve prepared with a monodisperse polystyrene standard sample.

Examples of the polycondensation resin include polyester resins. This polyester resin may be crystalline or amorphous.
Examples of the monomer contained in the polyester resin include polyvalent carboxylic acids containing 2 or more carboxyl groups in one molecule, polyhydric alcohols containing 2 or more hydroxyl groups in one molecule, and hydroxycarboxylic acids.

  Among the polycarboxylic acids contained in the crystalline polyester resin, examples of the dicarboxylic acid include oxalic acid, glutaric acid, succinic acid, maleic acid, adipic acid, β-methyladipic acid, azelaic acid, sebacic acid, and nonanedicarboxylic acid. , Decanedicarboxylic acid, undecanedicarboxylic acid, dodecanedicarboxylic acid, fumaric acid, citraconic acid, diglycolic acid, cyclohexane-3,5-diene-1,2-carboxylic acid, malic acid, citric acid, hexahydroterephthalic acid, malon Acid, pimelic acid, tartaric acid, mucous acid, phthalic acid, isophthalic acid, terephthalic acid, tetrachlorophthalic acid, chlorophthalic acid, nitrophthalic acid, p-carboxyphenylacetic acid, p-phenylenediacetic acid, m-phenylenediglycolic acid, p -Phenylene diglycolic acid, o-phenylene di Recolic acid, diphenylacetic acid, diphenyl-p, p'-dicarboxylic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-1,5-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, anthracene dicarboxylic acid, 1,4 -Cyclohexane dicarboxylic acid etc. are mentioned. Among these dicarboxylic acids, one type may be used alone, or two or more types may be used in combination.

  Among polyvalent carboxylic acids contained in the crystalline polyester resin, examples of the polyvalent carboxylic acid other than dicarboxylic acid include trimellitic acid, pyromellitic acid, naphthalenetricarboxylic acid, naphthalenetetracarboxylic acid, pyrenetricarboxylic acid, and pyrenetetracarboxylic acid. An acid etc. are mentioned. Moreover, you may use what derived the carboxy group of these carboxylic acid to the acid anhydride, mixed acid anhydride, acid chloride, ester, etc. Among these polyvalent carboxylic acids, one type may be used alone, or two or more types may be used in combination.

  Examples of the polyhydric alcohol contained in the crystalline polyester resin include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butanediol, and 1,4-butene. Diol, neopentyl glycol, 1,5-pentane glycol, 1,6-hexane glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, dipropylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, Examples thereof include bisphenol A, bisphenol Z, hydrogenated bisphenol A, cyclohexanedimethanol, and alkylene oxide adducts thereof. Among these polyhydric alcohols, one type may be used alone, or two or more types may be used in combination.

A crystalline polyester resin is obtained by performing polycondensation by combining the polyvalent carboxylic acid and the polyhydric alcohol.
Examples of crystalline polyester resins include polyester resins obtained by polycondensation of 1,9-nonanediol and 1,10-decanedicarboxylic acid, polyester resins obtained by polycondensation of cyclohexanediol and adipic acid, Polyester resin obtained by polycondensation of 1,6-hexanediol and sebacic acid, polyester resin obtained by polycondensation of ethylene glycol and succinic acid, polyester obtained by polycondensation of ethylene glycol and sebacic acid Examples thereof include a polyester resin obtained by polycondensation of a resin, 1,4-butanediol and succinic acid.

  Moreover, one of each of the polyvalent carboxylic acid and the polyhydric alcohol may be used, one may be used, and the other may be used in two or more. May be used. When using hydroxycarboxylic acid as a monomer, 1 type may be used independently and 2 or more types may be used together. Moreover, you may use together said polyhydric carboxylic acid or polyhydric alcohol, and hydroxycarboxylic acid.

  Among the polycarboxylic acids contained in the amorphous polyester resin, examples of the dicarboxylic acid include phthalic acid, isophthalic acid, terephthalic acid, tetrachlorophthalic acid, chlorophthalic acid, nitrophthalic acid, p-carboxyphenylacetic acid, and p-phenylene. Diacetic acid, m-phenylene diglycolic acid, p-phenylene diglycolic acid, o-phenylene diglycolic acid, diphenylacetic acid, diphenyl-p, p'-dicarboxylic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-1, 5-Dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, anthracene dicarboxylic acid, cyclohexane dicarboxylic acid and the like can be mentioned.

Among polyvalent carboxylic acids contained in the amorphous polyester resin, examples of the polyvalent carboxylic acid other than dicarboxylic acid include trimellitic acid, pyromellitic acid, naphthalenetricarboxylic acid, naphthalenetetracarboxylic acid, pyrenetricarboxylic acid, and pyrenetetra. A carboxylic acid etc. are mentioned. Moreover, you may use what derived the carboxy group of these carboxylic acid into the acid anhydride, acid chloride, or ester. Among these polyvalent carboxylic acids, one type may be used alone, or two or more types may be used in combination.
Among these, it is preferable to use terephthalic acid, its lower ester, diphenylacetic acid, 1,4-cyclohexanedicarboxylic acid, and the like. The lower ester is an ester of an aliphatic alcohol having 1 to 8 carbon atoms.

As polyhydric alcohol contained in an amorphous polyester resin, said polyhydric alcohol as polyhydric alcohol contained in crystalline polyester resin is mentioned, for example. Of these polyhydric alcohols, polytetramethylene glycol, bisphenol A, bisphenol Z, hydrogenated bisphenol A, cyclohexanedimethanol, and alkylene oxide adducts thereof are preferably used. Among these polyhydric alcohols, one type may be used alone, or two or more types may be used in combination.
An amorphous polyester resin can be obtained by polycondensation by combining the above polycarboxylic acid and polyhydric alcohol.

An amorphous resin or a crystalline resin can be obtained by polycondensation by combining the above polycondensable monomers.
In order to prepare the polycondensation resin, one of each of the above polyvalent carboxylic acids and polyhydric alcohols may be used, or one may be used and the other may be used in two or more. And two or more of each may be used. Moreover, when producing polycondensation resin using hydroxycarboxylic acid, 1 type may be used independently among hydroxycarboxylic acid, and 2 or more types may be used together. Moreover, you may use together said polyhydric carboxylic acid or polyhydric alcohol, and hydroxycarboxylic acid.

  The weight average molecular weight of the polycondensation resin is preferably from 1,500 to 60,000, and more preferably from 3,000 to 40,000. In addition, the polycondensation resin may have a partial branching or cross-linking depending on the carboxylic acid valence or alcohol valence of the monomer.

(Release agent)
The release agent is not particularly limited. For example, hydrocarbon wax, natural wax (eg, carnauba wax, rice wax, candelilla wax, etc.), synthetic or mineral / petroleum wax (eg, montan wax) And ester waxes (for example, fatty acid esters, montanic acid esters, etc.).

The melting temperature of the release agent is preferably 50 ° C. or higher and 110 ° C. or lower, and more preferably 60 ° C. or higher and 100 ° C. or lower.
The melting temperature is based on the DSC curve obtained by differential scanning calorimetry (DSC) based on the “melting peak temperature” described in JIS K-1987 “Method for measuring plastic transition temperature”. Desired.

  The ratio of the release agent contained in the pressure-sensitive toner is preferably 1% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass with respect to the mass of the pressure-sensitive toner.

(Internal additive)
Examples of the internal additive include additives such as a magnetic material, a charge control agent, and inorganic powder.

(External additive)
Examples of the external additive include inorganic particles. Examples of the inorganic particles include SiO ₂ , TiO ₂ , Al ₂ O ₃ , CuO, ZnO, SnO ₂ , CeO ₂ , Fe ₂ O ₃ , MgO, BaO, CaO, K ₂ O, Na ₂ O, ZrO ₂ , CaO.SiO ₂ , K ₂ O. (TiO ₂ ) _n , Al ₂ O ₃ .2SiO ₂ , CaCO ₃ , MgCO ₃ , BaSO ₄ , MgSO _{4 and the} like.

  The surface of the inorganic particles as the external additive is preferably subjected to a hydrophobic treatment. The hydrophobizing treatment is performed, for example, by immersing inorganic particles in a hydrophobizing agent. Although it does not specifically limit as a hydrophobization processing agent, For example, a silane coupling agent, a silicone oil, a titanate coupling agent, an aluminum coupling agent etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together. For example, the hydrophobizing agent is used in an amount of 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the inorganic particles.

Examples of external additives include resin particles (polystyrene, polymethyl methacrylate (PMMA), melamine resin, etc.), cleaning activators (for example, metal salts of higher fatty acids represented by zinc stearate, particles of fluorine-based high molecular weight substances). Etc.) may be used.
The ratio of the external additive contained in the pressure-sensitive toner is, for example, preferably 0.01% by mass to 5% by mass with respect to the mass of the pressure-sensitive toner, and is 0.01% by mass to 2.0% by mass. The following is more preferable.

<Characteristics of pressure-sensitive toner>
The pressure-sensitive toner used in the present embodiment has a reduced viscosity when pressed at a temperature of 70 ° C. or lower.
In the formation of a foil on a substrate on which a toner image is formed, for example, a resin sheet is used as a substrate, the foil is pressed against the resin sheet at a temperature higher than 70 ° C., and this foil is used as a toner on the resin sheet. When adhering to an image, the resin sheet may be deformed under the influence of heat. Further, when the foil is pressed at a temperature higher than 70 ° C. against a substrate on which a heat fixing toner image as an image different from the toner image used for bonding the foil to the substrate is formed, the heat fixing toner image The viscosity may decrease and the foil may adhere to this heat-fixed toner image. That is, when the foil is pressed onto the substrate at a temperature higher than 70 ° C. to form the foil on the toner image against the substrate, the quality of the wiring substrate on which the foil is formed may deteriorate.

In contrast, when the pressure-sensitive toner is pressurized at a temperature of 70 ° C. or lower, the viscosity of the pressure-sensitive toner is reduced without heating the substrate on which the pressure-sensitive toner image is formed. When the foil is pressed, the foil adheres to the pressure-sensitive toner, and the foil is formed on the pressure-sensitive toner image with respect to the paper P.
In this case, since the amount of heat applied to the substrate is reduced, deformation of the substrate is suppressed. Further, even when the heat-fixed toner image is formed on the substrate, the viscosity of the heat-fixed toner image is difficult to decrease, and thus the adhesion of the foil to the heat-fixed toner image is suppressed. That is, the deterioration of the quality of the wiring board is suppressed.

  Further, the pressure-sensitive toner of the present embodiment satisfies the following formula (1).

In the formula (1), T (1 MPa) indicates a temperature at which the pressure-sensitive toner has a viscosity of 10 ⁴ Pa · s when a pressure of 1 MPa is applied to the pressure-sensitive toner, and T (10 MPa) is The temperature at which the pressure-sensitive toner has a viscosity of 10 ⁴ Pa · s when a pressure of 10 MPa is applied to the pressure-sensitive toner is shown. In the present embodiment, the pressure applied to the pressure-sensitive toner is measured using a flow tester.

When the pressure-sensitive toner does not satisfy the formula (1), even if the pressure applied to the pressure-sensitive toner is increased in the range of 1 MPa to 10 MPa, the pressure-sensitive toner has a viscosity when the pressure-sensitive toner is pressed at a low temperature. Is difficult to decrease. In other words, the pressure dependency of the viscosity of the pressure-sensitive toner is low. In other words, when the pressure-sensitive toner is pressurized at a temperature of 70 ° C. or less with a pressure in the above range, the viscosity of the pressure-sensitive toner is unlikely to decrease.
On the other hand, when the pressure-sensitive toner satisfies the formula (1), as the pressure applied to the pressure-sensitive toner is increased in the above range, the viscosity of the pressure-sensitive toner when the pressure-sensitive toner is pressed at a low temperature decreases. It becomes easy to do. In other words, the pressure dependency of the viscosity of the pressure-sensitive toner is high, and the baroplastic property of the pressure-sensitive toner becomes remarkable. In other words, when the pressure-sensitive toner is pressurized at a temperature of 70 ° C. or less with a pressure in the above range, the viscosity of the pressure-sensitive toner tends to decrease. Therefore, when the foil is pressed against the substrate on which the pressure-sensitive toner image is formed without being heated, the foil is easily adhered to the pressure-sensitive toner.

Further, the temperature at which the viscosity of the pressure-sensitive toner becomes 10 ⁴ Pa · s when a pressure of 1 MPa is applied to the pressure-sensitive toner, and the viscosity of the pressure-sensitive toner when the pressure of 10 MPa is applied is 10 ^4. The temperature difference from the temperature at which Pa · s is reached is preferably 20 ° C. or higher and 120 ° C. or lower, more preferably 25 ° C. or higher and 80 ° C. or lower, and further preferably 30 ° C. or higher and 60 ° C. or lower.
When the temperature difference is 120 ° C. or less, a decrease in the viscosity of the pressure-sensitive toner is suppressed when a low pressure is applied to the pressure-sensitive toner. For this reason, the pressure-sensitive toner accommodated in the pressure-sensitive toner image forming unit 71 is prevented from adhering in the pressure-sensitive toner image forming unit 71 due to an external force or the like, and the particles are prevented from aggregating. That is, the pressure-sensitive toner becomes strong against pressure stress.

  The cumulative volume average particle size (D50v) of the pressure-sensitive toner is preferably 2 μm or more and 10 μm or less, and more preferably 4 μm or more and 8 μm or less.

In addition, Coulter Multisizer II (manufactured by Beckman-Coulter) is used to measure the cumulative volume average particle diameter and particle size distribution index of toner particles, and ISOTON-II (manufactured by Beckman-Coulter) is used to measure the electrolytic solution. Is used.
At the time of measurement, 0.5 to 50 mg of a measurement sample added to a dispersant consisting of 2 ml of a 5% aqueous solution of a surfactant is added to an electrolyte solution of 100 to 150 ml. As the surfactant, sodium alkylbenzene sulfonate is preferably used.
Subsequently, after subjecting the electrolyte in which the sample is suspended to a dispersion treatment for 1 minute using an ultrasonic disperser, particles having a diameter in the range of 2 μm to 60 μm using an aperture of 100 μm as the aperture diameter. The particle size distribution is measured with Coulter Multisizer II. The number of particles to be sampled is 50,000.
A cumulative distribution is drawn from the small diameter side with respect to the particle size range (channel) divided based on the measured particle size distribution, and the particle size that becomes 16% is the volume particle size D16v, the number particle size D16p, and the accumulation is 50%. Particle size is cumulative volume average particle size D50v, cumulative number average particle size D50p, particle size is 84% cumulative, volume particle size is D84v, particle size is D84p, particle size is 99% cumulative, volume particle size is D99v, several particles The diameter is defined as D99p. In this case, the volume average particle size distribution index (GSDv) and the number average particle size distribution index (GSDp) are obtained by the following equations, respectively.

Further, the shape factor SF1 of the pressure-sensitive toner is preferably 110 or more and 150 or less, and more preferably 120 or more and 140 or less.
The shape factor SF1 is obtained by the following equation.

In Equation (4), ML represents the absolute maximum length of the toner, and A represents the projected area of the toner. The absolute maximum length is a length that maximizes the distance between any two points on the particle outline. The projected area is the area of the projected image on the plane of the particle.
The shape factor SF1 is quantified mainly by analyzing a microscope image or a scanning electron microscope (SEM) image using an image analyzer. Specifically, an optical microscope image of particles dispersed on the surface of the slide glass is taken into a Luzex image analyzer by a video camera, and the absolute maximum length and projected area of 100 particles are obtained. Then, the shape factor SF1 of each particle is calculated by applying the absolute maximum length and the projected area of each particle to Equation (4), and the average value of the calculated values is obtained as the shape factor SF1 of the pressure-sensitive toner.

<Method for producing pressure-sensitive toner>
Next, a method for manufacturing pressure-sensitive toner will be described.
The method for producing the pressure-sensitive toner used in the present embodiment is not particularly limited, and examples thereof include a kneading and pulverizing method, an emulsion aggregation method, a dissolution suspension method, a suspension polymerization method, and a PxP method. Among these, the emulsion aggregation method and the dissolution suspension method are preferable.

(Emulsion aggregation method)
The emulsion aggregation method will be described.
The emulsion aggregation method is an emulsification step in which a pressure-sensitive toner raw material is emulsified to form resin particles (emulsion particles), an aggregation step in which aggregates including the formed resin particles are formed, and a fusion step in which the aggregates are fused. And including.

(Emulsification process)
First, a resin particle dispersion is prepared by applying a shearing force to a solution obtained by mixing an aqueous medium and a binder resin with a disperser. At this time, particles may be formed by heating to lower the viscosity of the resin component. A dispersant may be used for stabilizing the dispersed resin particles.
Further, if the resin is oily and dissolves in a solvent having a relatively low solubility in water, the resin is dissolved in these solvents and dispersed in water together with a dispersant and a polymer electrolyte, and then heated or heated. A resin particle dispersion is prepared by evaporating the solvent under reduced pressure.

Examples of the aqueous medium include water (for example, distilled water, ion exchange water, etc.), alcohols, and the like. Among these, it is preferable to use water.
Examples of the dispersant include water-soluble polymers (for example, polyvinyl alcohol, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, sodium polyacrylate, polysodium methacrylate), anionic surfactants (for example, dodecyl). Sodium benzenesulfonate, sodium octadecyl sulfate, sodium oleate, sodium laurate, potassium stearate, etc.), cationic surfactant (eg, laurylamine acetate, stearylamine acetate, lauryltrimethylammonium chloride, etc.), zwitterionic interface Activators (for example, lauryl dimethylamine oxide), nonionic surfactants (for example, polyoxyethylene alkyl ether, polyoxy Chi alkylphenyl ethers, polyoxyethylene alkyl amines, etc.), inorganic salts (e.g., tricalcium phosphate, aluminum hydroxide, calcium sulfate, calcium carbonate, barium carbonate, etc.) and the like.

Examples of the disperser include a homogenizer, a homomixer, a pressure kneader, an extruder, and a media disperser.
The volume average particle diameter of the resin particles is preferably 1.0 μm or less, more preferably 60 nm or more and 300 nm or less, and further preferably 150 nm or more and 250 nm or less. When the volume average particle diameter of the resin particles is less than 60 nm, the resin particles become stable in the dispersion, and thus aggregation of the resin particles may be difficult. When the volume average particle size of the resin particles exceeds 1.0 μm, the cohesiveness of the resin particles is improved and it becomes easy to produce a pressure-sensitive toner, but the particle size distribution of the pressure-sensitive toner may be widened.

Also, after dispersing the release agent in water together with polymer electrolytes such as ionic surfactants, polymer acids and polymer bases, it is heated to a temperature equal to or higher than the melting temperature of the release agent to give a strong shearing force. The release agent dispersion is prepared by dispersing using a homogenizer or a pressure discharge type dispersing machine. The volume average particle size of the release agent particles contained in the release agent dispersion is preferably 1 μm or less, and more preferably 100 nm to 500 nm.
When the volume average particle diameter of the release agent particles is 100 nm or more, the release agent component is easily taken into the pressure-sensitive toner. Further, when the volume average particle size of the release agent particles is 500 nm or less, the dispersion state of the release agent in the pressure-sensitive toner becomes good.

  In the dispersion treatment, an inorganic compound such as polyaluminum chloride may be added to the dispersion. As the inorganic compound, for example, polyaluminum chloride (PAC), aluminum sulfate, highly basic polyaluminum chloride (BAC), polyaluminum hydroxide, aluminum chloride and the like are preferable. Of these, polyaluminum chloride and aluminum sulfate are more preferable. The release agent dispersion is used in the emulsion aggregation method, but may be used when the toner is produced by the suspension polymerization method.

(Aggregation process)
In the aggregation step, a dispersion of resin particles, a release agent dispersion, and the like are mixed to form a mixed solution, which is heated and aggregated at a temperature equal to or lower than the glass transition temperature of the resin particles to form aggregated particles. In the formation of aggregated particles, an aggregating agent may be used. Aggregated particles are formed, for example, by acidifying the pH of the mixed solution with stirring. As pH, the range of 2-7 is preferable.
As the flocculant, a surfactant having a polarity opposite to that of the surfactant used as the dispersant, an inorganic metal salt, and a divalent or higher metal complex are preferable, and among these, a divalent or higher metal complex is more preferable. When a divalent or higher valent metal complex is used, the amount of surfactant used is reduced, and the charging characteristics are improved.

  As the inorganic metal salt, an aluminum salt and a polymer thereof are preferable. As the valence of the inorganic metal salt to be used, the particle size distribution of the formed aggregated particles tends to be narrower when the valence is divalent than monovalent, trivalent than bivalent, tetravalent than trivalent. . In addition, the particle size distribution of the formed aggregated particles tends to be narrower when the inorganic metal salt polymer is used than when the inorganic metal salt monomer is used. In order to narrow the particle size distribution of the aggregated particles, for example, it is preferable to use a polymer of a tetravalent inorganic metal salt containing aluminum.

  Moreover, the coating part containing the resin particles may be formed on the surface of the aggregated particles as the core part by adding a dispersion in which the resin particles are dispersed together with the surfactant or the like to the solution containing the aggregated particles. (Coating process). When adding the dispersion, a flocculant may be added or the pH may be adjusted.

(Fusion process)
In the fusing step, the aggregation progress is stopped by setting the pH of the suspension of aggregated particles to be in the range of 3 to 9, and the aggregated particles are fused by heating at a temperature equal to or higher than the glass transition temperature of the resin particles. . Further, when the surface of the aggregated particles is coated with the resin particles in the coating step, the resin particles are also fused to cover the core aggregated particles. The heating time in the fusing step may be such that the agglomerated particles are fused, specifically, about 0.5 hour or more and 10 hours or less.

By fusing the aggregated particles and then cooling, fused particles can be obtained. Further, in the cooling step, crystallization may be promoted by performing so-called gradual cooling in which the cooling rate is lowered in the vicinity of the glass transition temperature of the resin particles (the glass transition temperature of the resin particles ± 10 ° C.).
The fused particles are subjected to solid-liquid separation such as filtration (solid-liquid separation step), washed (washing step), and dried (drying step) to obtain pressure-sensitive toner particles.
Examples of the drying process include a method using an air flow drying device, and specifically, a drying process using a flash jet dryer, a process using a fluid bed, and the like. When performing a drying process using a flash jet dryer, the airflow temperature (inlet airflow temperature) is preferably set to 30 ° C. or higher and 70 ° C. or lower, and more preferably set to 40 ° C. or higher and 60 ° C. or lower.

Further, an external additive such as a fluidizing agent and an auxiliary agent may be added to the obtained pressure-sensitive toner particles (external addition step).
Examples of the external addition process include a process of adding an external additive to the pressure-sensitive toner particles using a V-type blender, a Henschel mixer, a Redige mixer, or the like. By this treatment, external additives can be added stepwise to the pressure-sensitive toner particles.

[Dissolution suspension method]
Subsequently, the dissolution suspension method will be described.
In the dissolution suspension method, an oil phase adjustment step in which a toner component containing a binder resin in an organic solvent is dissolved or dispersed to prepare an oil phase, and the oil phase component is suspended and granulated in an aqueous phase. A granulation step and a solvent removal step of removing the solvent.

(Oil phase adjustment process)
First, an oil phase is prepared by dissolving or dispersing a toner component containing at least a binder resin in an organic solvent.
Examples of the organic solvent include hydrocarbons (eg, toluene, xylene, hexane, etc.), halogenated hydrocarbons (eg, methylene chloride, chloroform, dichloroethane, etc.), alcohols (eg, ethanol, butanol, benzyl alcohol ether, tetrahydrofuran, etc.) ), Esters (for example, ether, methyl acetate, ethyl acetate, butyl acetate, isopropyl acetate, and the like) and ketones (for example, acetone, methyl ethyl ketone, diisobutyl ketone, cyclohexanone, methylcyclohexane, and the like). These solvents need to dissolve the binder resin, but the additives contained in the organic solvent may not be dissolved separately from the binder resin. The mass ratio between the toner component containing the binder resin used in the oil phase and the solvent is 10:90 to 80:20 in view of ease of granulation or final toner yield. A range is preferred.

(Granulation process)
The oil phase component is suspended and granulated in the aqueous phase. An example of the aqueous phase is water. Further, an inorganic particle dispersant obtained by mixing inorganic particles and a dispersant may be included in the aqueous phase.
The dispersant (dispersion stabilizer) has a function of dispersing and stabilizing the oil phase droplets by forming a hydrophilic colloid. Examples of the inorganic particle dispersant include calcium carbonate, magnesium carbonate, barium carbonate, tricalcium phosphate, hydroxyapatite, silicate diatomaceous earth, and clay.
The particle size of the inorganic particle dispersant is preferably 1 μm to 2 μm or less, and more preferably 0.1 μm or less. The inorganic particle dispersant is preferably used after being pulverized to a particle size required by a wet disperser such as a ball mill, a sand mill, or an attritor. When the particle size of the inorganic particle dispersant is 2 μm or less, the particle size distribution of the granulated toner becomes narrow.

Inorganic particle dispersants may be used alone or in combination with organic particle dispersants.
Examples of organic particle dispersants include proteins (eg, gelatin, gelatin derivatives (eg, acetylated gelatin, phthalated gelatin, succinated gelatin, etc.), albumin, casein, etc.), collodion, gum arabic, agar, alginic acid, Cellulose derivatives (eg, alkyl esters of carboxymethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, etc.), synthetic polymers (eg, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, polyacrylate, polymethacrylate, polymaleate, polystyrene sulfone) Acid salt) and the like. One of these organic particle dispersants may be used alone, or two or more thereof may be mixed and used.
The ratio of the inorganic particle dispersant and / or the organic particle dispersant contained in the aqueous phase is preferably 0.001% by mass or more and 5% by mass or less with respect to the main medium of the aqueous phase.

In addition, a dispersion aid may be included in the aqueous phase. As the dispersion aid, a surfactant is preferable. Examples of the surfactant include ionic surfactants and nonionic surfactants. One of these dispersion aids may be used alone, or two or more thereof may be used in combination.
The proportion of the dispersion aid contained in the aqueous phase is preferably 0.001% by mass or more and 5% by mass or less with respect to the main medium of the aqueous phase.

  The mass ratio between the oil phase and the water phase is preferably in the range of 10:90 to 90:10. The granulation of the oil phase in the aqueous phase is preferably performed using a disperser equipped with a high-speed shearing mechanism. Examples of the disperser provided with a high-speed shearing mechanism include high-speed blade rotating type and forced interval passing type emulsifying dispersers such as various homomixers, homogenizers, colloid mills, ultra turraxes, and Claire mills.

(Solvent removal step)
The organic solvent is removed during or after the granulation process. The removal of the organic solvent may be performed at room temperature (for example, 25 ° C.), but is preferably performed at a temperature lower than the boiling point of the organic solvent and lower than the glass transition temperature of the binder resin contained in the organic solvent. . When the organic solvent is removed at a temperature higher than the glass transition temperature of the binder resin, toner coalescence may occur. The removal of the organic solvent is preferably performed at about 40 ° C. for 3 to 24 hours. The removal of the organic solvent may be performed under reduced pressure. When removing the organic solvent under reduced pressure, it is preferably carried out under a pressure of 20 mmHg or more and 150 mmHg or less.

After the solvent is removed, the inorganic particle dispersant remaining on the toner surface is removed by washing the toner with an acid that makes the inorganic dispersant water-soluble. Examples of acids include hydrochloric acid, nitric acid, formic acid, acetic acid and the like. Further, the toner may be washed again using alkaline water such as sodium hydroxide. Thereby, the ionic substance insolubilized on the surface of the toner in an acidic atmosphere is dissolved and removed, and the charging property and fluidity of the toner are improved. These washings also remove the wax adhering to the toner surface. For the cleaning, it is preferable to use a stirrer or an ultrasonic dispersion device. The washed toner may be filtered, decanted, or centrifuged.
By drying the washed toner, pressure-sensitive toner particles can be obtained. Examples of the drying include a method using an airflow drying apparatus. Examples of the method using an air dryer include a drying process using a flash jet dryer and a process using a fluid bed. When performing a drying process using a flash jet dryer, as described above, the airflow temperature is preferably set to 30 ° C. or higher and 70 ° C. or lower, and more preferably set to 40 ° C. or higher and 60 ° C. or lower.

<Description of foil>
Subsequently, the foil will be described.
FIG. 2 is a diagram showing a configuration of the foil 100 used in the present embodiment.
The foil 100 is formed in a film shape, and includes a base material 100a, a release layer 100b, and a foil layer 100c.
In the foil 100, the base material 100a, the release layer 100b, and the foil layer 100c are stacked in this order from the lower side in the figure.

  The base material 100a serves as a support for the release layer 100b and the foil layer 100c. As the base material 100a, for example, a resin sheet or a resin film is used. Examples of the resin include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), polyethersulfone, polyimide, and the like. The substrate 100a may have a single layer structure or a multilayer structure.

  The release layer 100b is a layer having a function of ensuring the peelability of the foil layer 100c from the base material 100a. Examples of the material used for the release layer 100b include a material obtained by adding a wax to a thermosetting resin, an ultraviolet curable resin, or an electron beam curable resin. Examples of the thermosetting resin include a resin using melamine or isocyanate as a curing agent. Examples of the ultraviolet curable resin and the electron beam curable resin include resins containing an acrylate or an epoxy resin. Examples of the wax include a fluorine-based monomer, a silicon-based monomer, a fluorine-based polymer, and a silicon-based polymer. As the material used for the release layer 100b, one type may be used alone, or two or more types may be used in combination.

The foil layer 100c has a metal layer containing a metal material and has conductivity.
The metal layer is formed by, for example, a vapor deposition method, a sputtering method, an ion plating method or the like using a metal material. Examples of the metal material include aluminum, tin, silver, chromium nickel, gold, nickel-chromium-iron alloy, bronze, aluminum copper, and the like.

<Description of foil forming part>
Next, the foil formation part 80 is demonstrated.
FIG. 3 is a configuration diagram of the foil forming unit 80.
The foil forming unit 80 holds the long foil 100 formed integrally. Then, the foil 100 is pressed against the paper P. The length of the long foil 100 in the width direction (the depth direction in the figure) may be larger than the length of the paper P in the width direction.
The foil forming unit 80 includes a supply roll 81 that winds the foil 100 in a roll shape and supplies the foil 100, and a winding roll 82 that winds the foil 100 into a roll shape. The foil forming unit 80 includes a foil transfer roll 83 that stretches the foil 100 and transfers the foil 100 to the paper P, and a counter roll 84 that faces the foil transfer roll 83 via the foil 100. .

The foil transfer roll 83 is provided between the supply roll 81 and the take-up roll 82 and is provided closer to the base material 100a than the foil layer 100c (see FIG. 2) of the foil 100. The foil transfer roll 83 and the opposing roll 84 are pressed against each other.
The foil transfer roll 83 receives a rotational driving force from a driving motor (not shown) and rotates counterclockwise in the drawing. Then, the foil 100 is pressed against the paper P between the opposing roll 84. At this time, the foil transfer roll 83 may press the foil 100 against a region wider than the length of the paper P in the width direction.

<Manufacturing method of wiring board>
Then, the manufacturing method of a wiring board is demonstrated.
FIG. 4 is a flowchart illustrating a method for manufacturing a wiring board.
First, the image forming unit 10 of the image forming apparatus 1 (see FIG. 1) forms a heat-fixed toner image on the paper P in the secondary transfer region 23 (step (hereinafter referred to as S) 101: Thermal fixing toner image forming step). Next, the fixing unit 60 performs heat fixing processing on the paper P on which the heat fixing toner image is formed, and fixes the heat fixing toner image on the paper P (S102: heat fixing step). The formation and fixing of the heat fixing toner image may be omitted as necessary. Further, a formed body on which a heat fixing toner is formed in advance may be used.

Subsequently, the sheet P is transported to the pressure-sensitive toner image forming unit 70 along the transport path. The pressure-sensitive toner image forming unit 70 uses the pressure-sensitive toner having a particle size of 1.6 × 10 ⁻⁵ m or more and the volume fraction of the pressure-sensitive toner particles to be less than 1%, and forms the pressure-sensitive toner image on the sheet P. (S103: pressure-sensitive toner image forming step). The pressure-sensitive toner image forming step can also be regarded as a preparation step for preparing a substrate on which a pressure-sensitive toner image is formed.
Further, a pressure roll that presses the conveyed paper P may be provided between the pressure-sensitive toner image forming unit 70 and the foil forming unit 80. Using this pressing roll, the paper P before the foil is formed is pressurized, the viscosity of the pressure-sensitive toner of the pressure-sensitive toner image formed on the paper P is reduced, and the pressure-sensitive toner is adhered to the paper P. Thus, the pressure-sensitive toner image may be fixed on the paper P (pre-processing step).

The paper P on which the pressure-sensitive toner image is formed is conveyed to the foil forming unit 80. When the paper P enters between the foil transfer roll 83 (see FIG. 3) and the opposing roll 84, the foil transfer roll 83 presses the foil 100 against the paper P at a temperature of 70 ° C. or less. When the pressure-sensitive toner of the pressure-sensitive toner image formed on the paper P is pressed against the foil 100, the viscosity thereof is reduced and the pressure-sensitive toner adheres to the foil layer 100c (see FIG. 2) of the foil 100. Then, the foil layer 100c of the foil 100 overlapping the pressure-sensitive toner image is peeled from the base material 100a. Thereby, the foil 100 (the foil layer 100c of the foil 100) is formed on the pressure sensitive toner image on the paper P (S104: foil forming step).
Of the foil 100 held by the foil forming unit 80, the base material 100 a remaining as a result of the peeling of the foil layer 100 c and the portion of the foil 100 that was not formed on the paper P are wound up by the winding roll 82. .

  A wiring board is obtained by the above process. In the above foil forming step, the foil 100 is formed on the paper P without heating the paper P. Therefore, the viscosity of the heat fixing toner of the heat fixing toner image formed on the paper P is not easily lowered, and the foil is heated. Hard to adhere to fixing toner. Therefore, on the paper P, the foil 100 is formed on the pressure-sensitive toner image without forming the foil 100 on the heat-fixed toner image.

In addition, you may attach a semiconductor element with respect to the obtained wiring board (attachment process). In this case, the pressure-sensitive toner image forming process and the foil forming process can be regarded as a wiring board preparation process for preparing a wiring board.
The method for attaching the semiconductor element to the wiring board is not particularly limited. For example, the terminal is attached to the wiring using a stapler having conductive staples in a state where the terminal of the semiconductor element is in contact with the wiring of the wiring board. A method is mentioned. Further, for example, there is a method of soldering the terminals of the semiconductor element to the wiring by using a soldering iron having a normal temperature solidified type conductive adhesive or conductive solder.
Although it does not specifically limit as a semiconductor element, For example, a diode, a transistor, a thyristor etc. are mentioned.
Through the above steps, an integrated circuit in which a semiconductor element is attached to a wiring board is obtained.

When the image forming apparatus 1 is used to form a heat-fixed toner image or a foil 100 on a substrate on which a semiconductor element is attached, the semiconductor in the process of applying heat or pressure to the substrate in the image forming apparatus 1. The device may be damaged. Further, when the foil 100 is formed on the substrate to which the semiconductor element is attached, if there is a step between the portion of the substrate where the semiconductor element is attached and the portion where the semiconductor element is not attached, the foil 100 is formed at the step portion. Is difficult to form.
On the other hand, in this embodiment, the semiconductor element is attached to the substrate on which the wiring is formed. In this case, the semiconductor element is prevented from being damaged in the image forming apparatus 1. Moreover, it becomes easy to form the foil 100 with respect to a board | substrate.

In the present embodiment, the foil 100 is formed on the pressure-sensitive toner image on the paper P by pressing and pressing the integrally formed film-like foil 100 against the paper P in the foil forming step. To do.
In this case, as compared with the case where a plurality of foils formed separately from each other are formed on the paper P, the occurrence of a portion where no foil is formed on the pressure-sensitive toner image on the paper P is suppressed.

<Modification>
In the present embodiment, the foil forming unit 80 (see FIG. 3) presses the integrally formed foil 100 against the paper P to form the foil 100 as a wiring on the pressure sensitive toner image with respect to the paper P. However, the configuration necessary for forming the foil as the wiring on the paper P is not limited to the above example.
FIG. 5 is a view showing a foil forming unit 90 as a modified example.

In this modified example, the foil forming unit 90 forms a plurality of powdery foils 110 on the paper P to manufacture a wiring board.
The foil 110 shown in FIG. 5 contains metal powder. Examples of the metal powder include gold powder, silver powder, aluminum powder, tin powder, chromium powder, nickel powder, and bronze powder.

The foil forming unit 90 includes a holding roll 91 that holds the foil 110, a foil transfer roll 92 that transfers the foil 110 to the paper P, and a counter roll 93 that faces the foil transfer roll 92.
The surface of the holding roll 91 is adsorptive. Examples of the adsorbing material include silicon rubber, urethane rubber, fluorine rubber, natural rubber, styrene butadiene rubber, and nitrile rubber. As the holding roll 91, a silicon roll or a urethane roll may be used.

  The holding roll 91 rotates while holding the plurality of foils 110. Specifically, the holding roll 91 rotates in the clockwise direction in the drawing while adsorbing and holding the foil 110 supplied from a cartridge (not shown) containing a plurality of foils 110 on the surface. The length in the width direction (the depth direction in the drawing) of the holding roll 91 in the region where the foil 110 is attracted may be larger than the length in the width direction of the paper P.

The surface of the foil transfer roll 92 is adsorptive. Examples of the adsorbing material include silicon rubber, urethane rubber, fluorine rubber, natural rubber, styrene butadiene rubber, and nitrile rubber. As the foil transfer roll 92, a silicon roll or a urethane roll may be used.
Further, the surface adsorption force of the foil transfer roll 92 is larger than the surface adsorption force of the holding roll 91.

  The foil transfer roll 92 rotates counterclockwise in the drawing. The foil transfer roll 92 and the holding roll 91 are pressed against each other, and the holding roll 91 supplies the foil 110 to the foil transfer roll 92 at this pressing portion T. The length in the width direction (the depth direction in the figure) of the region where the foil 110 is supplied in the foil transfer roll 92 may be greater than the length in the width direction of the paper P.

In the modified example, after the pressure-sensitive toner image is formed on the paper P, the foil 110 is formed on the pressure-sensitive toner image on the paper P.
The paper P is conveyed to the foil forming unit 90 after a pressure-sensitive toner image is formed by the pressure-sensitive toner image forming unit 71 (see FIG. 1). When the paper P enters between the foil transfer roll 92 and the opposing roll 93, the foil transfer roll 92 presses the plurality of powdered foils 110 against the paper P at a temperature of 70 ° C. or less. As a result, among the plurality of foils 110 pressed by the foil transfer roll 92 against the paper P, the foil 110 that overlaps the pressure-sensitive toner image adheres to the pressure-sensitive toner of the pressure-sensitive toner image and A foil 110 is formed on the toner image. Of the plurality of foils 110 pressed by the foil transfer roll 92 against the paper P, the foil 110 not formed on the paper P is held by the foil transfer roll 92 thereafter.
The foil transfer roll 92 may press the foil 110 against a region wider than the length in the width direction of the paper P.

  In the configuration in which a plurality of powdery foils 110 are formed on the paper P using the foil forming unit 90 of the modified example, the foil 100 formed as an integral unit on the paper P using the foil forming unit 80 shown in FIG. Compared to the structure to be formed, the amount of foil used for forming the next foil among the foils not formed on the paper P is increased.

For example, in the case where the integrally formed foil 100 is formed on the paper P as in the configuration shown in FIG. 2, the portion of the foil 100 held by the foil forming unit 80 where the foil layer 100 c does not remain. Is not used for subsequent foil formation. Further, the peripheral portion of the portion where the foil layer 100c does not remain (the portion where the foil layer 100c remains) is not used for the next foil formation.
On the other hand, when a plurality of foils 110 that are formed as separate bodies are formed on the paper P as in the configuration shown in the modification, the paper among the foils 110 that the foil transfer roll 92 holds. The foil 110 that has not been formed on P continues to be held on the foil transfer roll 92 and is used for the next foil formation. In this case, the amount of the foil 110 used for the next foil formation increases.

  In the present embodiment, an example in which the paper P is used as the substrate has been described. However, the substrate is not particularly limited as long as a foil is formed or a semiconductor element is attached. For example, a resin sheet or a resin film may be used as the substrate.

In this embodiment, the image forming apparatus 1 includes the pressure-sensitive toner image forming unit 70 and the foil forming unit 80. However, the present invention is not limited to this.
For example, separately from the image forming apparatus 1, a foil forming apparatus having a pressure-sensitive toner image forming unit and a foil forming unit may be provided. In this case, first, a heat-fixed toner image is formed on the substrate using the image forming apparatus. Subsequently, the substrate on which the heat-fixed toner image is formed is taken out from the image forming apparatus, and a pressure-sensitive toner image is formed on the substrate using a pressure-sensitive toner image forming unit. Then, the foil may be formed on the pressure-sensitive toner image by pressing the foil against the substrate on which the pressure-sensitive toner image is formed using the foil forming unit.
Further, the pressure-sensitive toner image forming unit and the foil forming unit may be provided in different apparatuses. Alternatively, a pressure-sensitive toner image may be formed on the substrate without forming a heat-fixed toner image, and a foil may be formed on the pressure-sensitive toner image.

  Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited by these examples as long as the gist thereof is not exceeded.

A wiring board was produced and evaluated. The experimental conditions are shown in Table 1 below.
(Example 1)
[Preparation of high Tg resin particle dispersion (1) by emulsion aggregation method]
First, in order to prepare a high Tg resin particle dispersion, the following samples were prepared.
-Styrene: 450 parts by mass-n-butyl acrylate: 150 parts by mass-Acrylic acid: 12 parts by mass-Dodecanethiol: 9 parts by mass

The above sample was mixed and dissolved to prepare a mixed solution. Further, 20 parts by mass of an anionic surfactant (manufactured by Dow Chemical Co., Ltd .: DOWFAX (registered trademark) 2A1) is added to 250 parts by mass of ion-exchanged water contained in the flask and dissolved, and the prepared mixed solution is added. In addition, a monomer emulsion was prepared by dispersing and emulsifying in a flask.
Furthermore, 3 parts by mass of the anionic surfactant was added to 555 parts by mass of ion-exchanged water contained in the polymerization flask and dissolved. Nitrogen was injected into the tightly stoppered polymerization flask through a reflux tank and the mixture was heated with stirring until the solution in the polymerization flask reached 75 ° C. using a water bath.

What melt | dissolved 9 mass parts of ammonium persulfate with respect to 43 mass parts of ion-exchange water was dripped over 20 minutes in the flask for superposition | polymerization via the metering pump. Thereafter, the prepared monomer emulsion was dropped into the polymerization flask through a metering pump over 200 minutes.
While continuing to stir the polymerization flask, the polymerization flask was held at 75 ° C. for 3 hours to complete the polymerization. As a result, a high Tg resin particle dispersion (1) was obtained. The high Tg resin particles in the dispersion had a center diameter of 75 nm, a glass transition temperature of 51 ° C., a weight average molecular weight of 29000, and a solid content of 42% by weight.

[Preparation of low Tg resin particle dispersion (1) by emulsion aggregation method]
In order to prepare a low Tg resin particle dispersion, the following samples were prepared.
-Styrene: 100 parts by mass-n-butyl acrylate: 500 parts by mass-Acrylic acid: 12 parts by mass-Dodecanethiol: 9 parts by mass

The above sample was mixed and dissolved to prepare a mixed solution. In addition, 20 parts by mass of an anionic surfactant (Dow Chemical Co., Ltd .: DOWFAX 2A1) was added to 250 parts by mass of ion-exchanged water contained in the flask and dissolved, and the prepared mixed solution was added in the flask. A monomer emulsion was prepared by dispersing and emulsifying.
Furthermore, 3 parts by mass of the anionic surfactant was added to 555 parts by mass of ion-exchanged water contained in the polymerization flask and dissolved. Nitrogen was injected into the tightly stoppered polymerization flask through a reflux tank and the mixture was heated with stirring until the solution in the polymerization flask reached 75 ° C. using a water bath.

What melt | dissolved 9 mass parts of ammonium persulfate with respect to 43 mass parts of ion-exchange water was dripped over 20 minutes in the flask for superposition | polymerization via the metering pump. Thereafter, the prepared monomer emulsion was dropped into the polymerization flask through a metering pump over 200 minutes.
While continuing to stir the polymerization flask, the polymerization flask was held at 75 ° C. for 3 hours to complete the polymerization. As a result, a low Tg resin particle dispersion (1) was obtained. The low Tg resin particles in this dispersion had a center diameter of 50 nm, a glass transition temperature of 10 ° C., a weight average molecular weight of 26000, and a solid content of 42% by weight.

[Preparation of pressure-sensitive toner particles]
In order to prepare pressure sensitive toner particles, the following samples were prepared.
-High Tg resin particle dispersion (1): 100 parts by mass (42 parts by mass of high Tg resin particles)
-Low Tg resin particle dispersion (1): 100 parts by mass (42 parts by mass of low Tg resin particles)
-Polyaluminum chloride: 0.15 parts by mass-Ion exchange water: 300 parts by mass

  Put the above sample into a round stainless steel flask, mix and disperse the solution in the flask using a homogenizer (IKA: Ultra Turrax (registered trademark) T50), then use an oil bath for heating. The solution in the flask was heated to 42 ° C. while stirring for 60 minutes. Thereafter, in order to form a coating portion of the pressure-sensitive toner particles, the high Tg resin particle dispersion (1) was added to the 100 mass parts (21 mass parts of high Tg resin particles) flask and gently stirred.

  A 0.5 mol / L sodium hydroxide aqueous solution was added to the flask to adjust the pH to 5.5, and the solution in the flask was heated to 90 ° C. while continuing to stir the flask. Here, the above sodium hydroxide aqueous solution was added to the flask to adjust the pH so as not to be 5.0 or less.

  After the reaction of the solution in the flask was completed, the solution was cooled and then filtered. The filtered solution was washed with ion exchanged water, and then solid-liquid separated by Nutsche suction filtration. The obtained solid was added to ion exchange water at 40 ° C. and redispersed, and stirred and washed at 100 rpm for 15 minutes using a stainless impeller. This washing process was repeated three times, and the washed solution was subjected to solid-liquid separation by Nutsche suction filtration, and then the water content of the solid was adjusted to 40%. The solid was dried using a flash jet dryer whose inlet airflow temperature was set to 80 ° C. to obtain pressure-sensitive toner particles.

When the particle size of the pressure-sensitive toner particles was measured using Coulter Multisizer II, the cumulative volume average particle size (D50v) was 6.5 μm, the volume average particle size distribution index (GSDv) was 1.23, and The volume fraction of pressure-sensitive toner particles having a particle diameter of 16 μm or more was 0.2%, which was less than 1%. Further, the shape factor (SF1) of the pressure-sensitive toner particles was 130.
Further, when a cross section of the pressure-sensitive toner particles was observed using a transmission electron microscope, it was confirmed that a core-shell structure was formed.
Further, T (1 MPa) −T (10 MPa) shown in the above formula (1) of this pressure-sensitive toner was measured and found to be 35 ° C.

(Preparation of developer)
A toner added with 1.5 parts by mass of hydrophobic silica (Cabot: TS720) to 50 parts by mass of the pressure-sensitive toner particles was mixed by a sample mill to obtain an externally added toner. The externally added pressure-sensitive toner was stored for 17 hours in an atmosphere at a temperature of 50 ° C. and a humidity of 50% using a constant temperature and humidity chamber. When the pressure-sensitive toner stored using a 35-micron mesh was sieved, it was confirmed that no pressure-sensitive toner remained on the mesh and no pressure-sensitive toner was aggregated (blocked).

  A ferrite carrier coated with 1% by weight of polymethyl methacrylate manufactured by Soken Chemical Co., Ltd. and a pressure-sensitive toner were mixed, and the developer was prepared by stirring and mixing for 5 minutes using a ball mill. The amount of pressure-sensitive toner was adjusted so that the ratio of pressure-sensitive toner to developer was 8% by weight.

[Production of wiring board]
Using DocuCentre C7550I manufactured by Fuji Xerox Co., Ltd., a heat fixing toner image was formed on an OK top coat (A4 size: 127 g / m ² ) manufactured by Oji Paper Co., Ltd. and subjected to heat fixing processing.
A pressure-sensitive toner image was formed on the paper on which the heat-fixed toner image was formed by using DocuCentre450 manufactured by Fuji Xerox Co., Ltd. loaded with the developer. Further, using the foil forming unit 80 shown in FIG. 3, the long foil 100 is pressed against the paper on which the pressure-sensitive toner image is formed at a temperature of 30 ° C. and a pressure of 10 MPa. A foil 100 was formed on the pressure-sensitive toner image.
The wiring board of this example was manufactured through the above steps.

(Example 2)
[Preparation of resin particles (1) by dissolution suspension method]
A high Tg resin latex using the high Tg resin particle dispersion (1) and a 2-ethylhexyl acrylate low Tg resin latex (manufactured by DIC Corporation: CE6400 (glass transition temperature: about −40 ° C.)) having a solid content of 50 Mixed in percentages. Using a warm air dryer, the mixed resin latex was dried to remove moisture, and resin particles (1) were obtained. It was confirmed that the resin particles (1) are opaque and opaque and phase separation occurs.

[Preparation of toner solution]
100 parts by mass of the above resin particles (1), 300 parts by mass of tetrahydrofuran (THF), and 300 parts by mass of ethyl acetate were mixed. Using a ball mill, the mixed solution was dispersed for 3 hours to prepare a toner solution.
In addition, 200 parts by mass of calcium carbonate (Maruo Calcium Co., Ltd .: Luminous), 5 parts by mass of an anionic surfactant (Daiichi Kogyo Seiyaku Co., Ltd .: Neogen (registered trademark) RK), and 400 parts by mass of ion-exchanged water Mixed. Using a ball mill, the mixed solution was dispersed for 2 hours. Furthermore, 900 parts by mass of ion-exchanged water was added to the mixed solution, and uniform mixing was performed using a homogenizer to prepare a calcium carbonate dispersion.

[Preparation of pressure-sensitive toner particles]
While continuing uniform mixing of the calcium carbonate dispersion using a homogenizer, the above toner solution is added to the calcium carbonate dispersion to uniformly emulsify, and the solvent is removed over 4 hours while heating to 40 ° C. did. Further, 400 parts by mass of 1 mol / L hydrochloric acid was added to dissolve calcium carbonate. The solution was sieved using a 15-micron nylon mesh, filtered, washed with ion-exchanged water, and then solid-liquid separated by Nutsche suction filtration. The obtained solid was added to ion exchange water at 40 ° C. and redispersed, and stirred and washed at 100 rpm for 15 minutes using a stainless impeller. This washing process was repeated three times, and the washed solution was subjected to solid-liquid separation by Nutsche suction filtration, and then the water content of the solid was adjusted to 40%. The solid was dried using a flash jet dryer whose inlet airflow temperature was set to 80 ° C. to obtain pressure-sensitive toner particles.

When the particle size of the pressure-sensitive toner particles was measured using Coulter Multisizer II, the cumulative volume average particle size (D50v) was 8.3 μm, the volume average particle size distribution index (GSDv) was 1.26, The volume fraction of pressure-sensitive toner particles having a diameter of 16 μm or more was 0.7%, which was less than 1%. The shape factor (SF1) of the pressure-sensitive toner particles was 126.
Further, when a cross section of the pressure-sensitive toner particles was observed using a transmission electron microscope, it was confirmed that the surface layer had a core-shell structure composed of a calcium carbonate particle layer.
Further, T (1 MPa) −T (10 MPa) shown in the above formula (1) of this pressure-sensitive toner was measured and found to be 35 ° C.

(Preparation of developer)
A developer was prepared in the same manner as in Example 1.

[Production of wiring board]
Using DocuCentre C7550I manufactured by Fuji Xerox Co., Ltd., a heat fixing toner image was formed on an OK top coat (A4 size: 127 g / m ² ) manufactured by Oji Paper Co., Ltd. and subjected to heat fixing processing.
A pressure-sensitive toner image was formed on the paper on which the heat-fixed toner image was formed by using DocuCentre450 manufactured by Fuji Xerox Co., Ltd. loaded with the developer. Further, the foil forming unit 90 shown in FIG. 5 is used to press the powdery foil 110 against the paper on which the pressure-sensitive toner image is formed at a temperature of 65 ° C. and a pressure of 10 MPa. A foil 110 was formed on the pressure-sensitive toner image.

(Example 3)
A wiring board was fabricated in the same manner as in Example 1 except that Example 1 was changed as shown in Table 1. A 20-micron thick polyethylene sheet was used as the resin sheet.

Example 4
The high Tg resin particle dispersion (1) used in Example 1 was 50 parts by mass (21 parts by mass of high Tg resin particles), and the low Tg resin particle dispersion (1) was 100 parts by mass (low Tg resin particles 42). A foil-formed body was prepared in the same manner as in Example 1, except that the weight was changed as shown in Table 1.
When the particle size of the pressure-sensitive toner particles was measured using Coulter Multisizer II, the cumulative volume average particle size (D50v) was 5.9 μm, and the volume average particle size distribution index (GSDv) was 1.25. The shape factor (SF1) of the pressure-sensitive toner particles was 130, and the volume fraction of the pressure-sensitive toner particles having a particle diameter of 16 μm or more was 0.5%, which was less than 1%.

(Comparative Examples 1-3)
A wiring board was fabricated in the same manner as in Example 1, except that the changes shown in Table 1 and the changes shown below were made with respect to Example 1.
That is, in Comparative Examples 1 to 4, a pressure-sensitive toner having a particle size of 16 μm or more and a volume fraction of pressure-sensitive toner particles of 1% or more was used.
Moreover, in the comparative example 2, foil is pressed at 80 degreeC higher than 70 degreeC with respect to the resin-made sheets as a board | substrate.
Moreover, in the comparative example 3, foil is pressed at 100 degreeC higher than 70 degreeC with respect to the paper as a board | substrate.
In addition, regarding the production of the toners of Comparative Examples 1 to 3, a sample was put into a round stainless steel flask, and the solution in the flask was mixed using a homogenizer (manufactured by IKA: Ultra Turrax (registered trademark) T50). After the dispersion, the solution in the flask was heated to 42 ° C. while stirring the flask using a heating oil bath and held for 60 minutes. Thereafter, in order to form a coating portion of the pressure-sensitive toner particles, the high Tg resin particle dispersion (1) was added to the 100 mass parts (21 mass parts of high Tg resin particles) flask and gently stirred. Further, a 0.5 mol / L aqueous sodium hydroxide solution was added to the flask to adjust the pH to 5.0, and the solution in the flask was heated to 90 ° C. while stirring the flask. Thereafter, when the solution was allowed to stand, the pH dropped to 4.0, and generation of some coarse powder was observed.
When the particle diameters of the toner particles of Comparative Examples 1 to 3 were measured using a Coulter Multisizer II, all had a cumulative volume average particle diameter (D50v) of 6.3 μm and a volume average particle diameter distribution index (GSDv) of 1.28. The shape factor (SF1) of the pressure-sensitive toner particles was 122, and the volume fraction of the pressure-sensitive toner particles having a particle diameter of 16 μm or more was 1.4%, exceeding 1%.

(Comparative Example 4)
A foil-formed body was produced in the same manner as in Example 1 except that Example 1 was changed as shown in Table 1 and the following changes were made.
That is, the high Tg resin particle dispersion liquid (1) used in Example 1 was 20 parts by mass (high Tg resin particle 8.4 parts by mass), and the low Tg resin particle dispersion liquid (1) was 100 parts by mass (low). Tg resin particles 42 parts by mass). Furthermore, in the preparation of pressure-sensitive toner particles, a sample was put into a round stainless steel flask, and the solution in the flask was mixed and dispersed using a homogenizer (IKA: Ultra Turrax (registered trademark) T50), and then heated. The solution in the flask was heated to 42 ° C. while stirring the flask using an oil bath, and held for 60 minutes, and then the toner was granulated without adding the high Tg resin particle dispersion (1). As a result, a toner having no core-shell structure was produced. In addition, coarse powder increased due to toner aggregation during drying.
When the particle size of the pressure-sensitive toner particles was measured using Coulter Multisizer II, the cumulative volume average particle size (D50v) was 6.7 μm, and the volume average particle size distribution index (GSDv) was 1.29. The shape factor (SF1) of the pressure-sensitive toner particles was 133, and the volume fraction of the pressure-sensitive toner particles having a particle diameter of 16 μm or more was 1.8%, exceeding 1%.
Further, in the toner of Comparative Example 4, toner agglomerates (blocking) occurred when stored as an externally added toner similar to Example 1 at a temperature of 50 ° C. and a humidity of 50% for 17 hours.
Moreover, in the comparative example 4, the measured value of T (1 MPa) -T (10 MPa) shown in the above formula (1) was 15 ° C. lower than 20 ° C.

[Evaluation of short circuit]
The presence or absence of short circuit was evaluated about the wiring board produced on each conditions of Examples 1-4 and Comparative Examples 1-4.
FIG. 6 is a diagram showing a substrate used for evaluating the presence or absence of a short circuit.
As shown in FIG. 6, five types of linear pressure-sensitive toner images having different widths were formed on each substrate. Specifically, five pressure-sensitive toner images G1 having a width of about 0.4 mm, a pressure-sensitive toner image G2 having a width of about 1 mm, and a pressure-sensitive toner image G3 having a width of about 2 mm were formed. The interval L between the adjacent pressure-sensitive toner images G1, the interval L between the adjacent pressure-sensitive toner images G2, and the interval L between the adjacent pressure-sensitive toner images G3 were all about 1 mm. A foil is formed on each of the substrates on the pressure-sensitive toner image G1, the pressure-sensitive toner image G2, and the pressure-sensitive toner image G3, and a width of about 0.4 mm, a width of about 1 mm, A wiring board in which five 2 mm wirings were formed was prepared. In addition, ten wiring boards were produced by the above method.

Using a digital multimeter, the presence or absence of a short circuit was evaluated for each of the obtained wiring boards. Specifically, one terminal of a digital multimeter is brought into contact with one of adjacent wirings among five wirings having a width of about 0.4 mm, and the other terminal of the digital multimeter is connected to the other wiring. The presence or absence of a short circuit was evaluated depending on whether or not it was brought into contact. In addition, the presence or absence of a short circuit was similarly evaluated for a wiring having a width of about 1 mm and a wiring having a width of about 2 mm. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of “◯” was accepted and an evaluation of “x” was rejected.
A: No short circuit was confirmed on all the wiring boards.
X: A short circuit was confirmed in one or more wiring boards.

[Evaluation of disconnection]
The wiring boards produced under the conditions of Examples 1 to 4 and Comparative Examples 1 to 4 were evaluated for the presence or absence of disconnection in the wiring.
For each of the wiring boards used for the evaluation of the short circuit, the presence or absence of disconnection in the wiring was evaluated using a digital multimeter. Specifically, one terminal of the digital multimeter is brought into contact with the upper end portion of the wiring having a width of about 0.4 mm, and the other terminal of the digital multimeter is brought into contact with the lower end portion of the wiring to be conductive. The presence or absence of disconnection was evaluated depending on whether or not. The remaining four wires having a width of about 0.4 mm were similarly evaluated for the presence or absence of disconnection. Further, the presence or absence of disconnection was similarly evaluated for five wires having a width of about 1 mm and five wires having a width of about 2 mm. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of “◯” was accepted and an evaluation of “x” was rejected.
A: No disconnection of wiring was confirmed on all wiring boards.
X: The disconnection of the wiring was confirmed by the 1 or more wiring board.

[Operational evaluation of semiconductor elements]
An integrated circuit was produced under the conditions of Examples 1 to 4 and Comparative Examples 1 to 4, and the operation of the semiconductor element attached to the produced integrated circuit was evaluated.
FIG. 7 is a diagram showing an integrated circuit used for evaluating the operation of the semiconductor element.
Two pressure-sensitive toner images having a length of 3 cm and a width of 1 cm were formed in series with respect to the substrate. The distance X between the two pressure-sensitive toner images was 1 cm. Further, a foil as a wiring was formed on each of the two pressure-sensitive toner images on the substrate to produce a wiring substrate.

A Schottky barrier diode 200 (manufactured by Renesas: 1SS106) and a light-emitting diode 300 (manufactured by OptoSupply: LED OSDR3133A) were attached to this wiring board to produce a rectenna as an integrated circuit. Specifically, using a conductive staple S (No. 10 manufactured by Max Co.) polished with a file, one terminal (left terminal in the figure) of the Schottky barrier diode 200 and one of the light-emitting diode 300 are used. A terminal (terminal on the left side in the figure) was attached to one wiring (wiring on the left side in the figure). Further, using the staple S, the other terminal (right terminal in the figure) of the Schottky barrier diode 200 and the other terminal (right terminal in the figure) of the light emitting diode 300 are connected to another wiring (right side in the figure). Attached to the wiring).
This rectenna receives a 2.4 GHz radio wave, converts the generated alternating current into direct current by the Schottky barrier diode 200, and causes the light emitting diode 300 to emit light by the converted direct current.

The presence or absence of the operation of the semiconductor element in this integrated circuit was evaluated by transmitting 2.4 GHz radio waves to the rectenna and determining whether or not the light emitting diodes emitted light. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of “◯” was accepted and an evaluation of “x” was rejected.
O: Light emission of the light emitting diode 300 was confirmed.
X: The light emission of the light emitting diode 300 was not confirmed.

[Evaluation of insulation between stacked wires]
About the wiring board produced on each conditions of Examples 1-4 and Comparative Examples 1-4, the insulation evaluation between the wiring piled up and down was performed.
FIG. 8 is a diagram showing a wiring board used for the insulation evaluation.
A pressure-sensitive toner image having a length of 3 cm and a width of 1 cm was formed on the substrate, and a foil as a wiring was formed on the pressure-sensitive toner image on the substrate. Further, a pressure-sensitive toner image having a length of 3 cm and a width of 1 cm was formed on the wiring with respect to the substrate so as to intersect the wiring. Then, a foil was formed on the pressure-sensitive toner image with respect to the substrate to produce a wiring substrate in which two wirings were overlaid.

Using a digital multimeter, the insulation between the wirings stacked one above the other was evaluated. Specifically, one of the terminals of the digital multimeter is brought into contact with one point A in the upper layer wiring, and the other terminal is brought into contact with one point B in the lower layer wiring. did. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of “◯” was accepted and an evaluation of “x” was rejected.
◯: No conduction was confirmed between the stacked wirings.
X: Conductivity was confirmed between the stacked wirings.

[Evaluation of wiring board for deformation]
The presence or absence of deformation in the wiring boards of Examples 1 to 4 and Comparative Examples 1 to 4 was evaluated.
Specifically, the wiring board was visually observed and the presence or absence of deformation of the wiring board was evaluated. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of none was accepted and an evaluation of yes was rejected.
None: Deformation and wrinkles of the wiring board were not confirmed.
Existence: Either deformation or wrinkle of the wiring board was confirmed.

[Evaluation of fixing properties of foil]
The fixing properties of the foils were evaluated for the wiring boards of Examples 1 to 4 and Comparative Examples 1 to 4.
Specifically, the wiring board was visually observed, and the fixability of the foil formed on the toner image (the toner image used for bonding the foil) to the wiring board was evaluated. The evaluation criteria are as follows. Among the following evaluation criteria, the evaluations of “◎” and “◯” were accepted and the evaluation of “x” was rejected.
A: The foil is not lifted off the wiring board, and the foil does not peel off even if rubbed with a nail. There was a part that floated from, and I could peel off the foil easily with my nails

[Evaluation of presence or absence of foil formed on heat-fixed toner image]
The wiring boards of Examples 1 to 4 and Comparative Examples 1 to 4 were evaluated for the presence or absence of a foil formed on the heat-fixed toner image.
Specifically, the wiring board was visually observed to evaluate whether or not a foil was formed on the heat fixing toner image with respect to the wiring board. The evaluation criteria are as follows. Among the following evaluation criteria, an evaluation of none was accepted and an evaluation of yes was rejected.
No: No foil is formed on the heat fixing toner image on the wiring board. Yes: At least a part of the foil is formed on the heat fixing toner image on the wiring board.

[Evaluation result of short circuit]
The evaluation results of the short circuit are shown in Table 2.
In any of Examples 1 to 4, no short circuit was observed on the wiring board.
On the other hand, in Comparative Examples 1-4, the short circuit was confirmed by the at least 1 or more wiring board. Here, in Comparative Examples 1 to 4, a pressure-sensitive toner having a volume fraction of 1% or more of pressure-sensitive toner particles having a particle diameter of 16 μm or more is used. As a result, the width of the pressure-sensitive toner image formed on the substrate varies, and the width of the foil formed on the pressure-sensitive toner image varies. It is considered that variation occurred and short circuit occurred between adjacent wirings.

[Evaluation results for disconnection]
Table 2 shows the evaluation results of the presence or absence of disconnection.
In any of Examples 1 to 4, disconnection of wiring was not confirmed on the wiring board.
On the other hand, in Comparative Examples 1-4, the disconnection of wiring was confirmed by the at least 1 or more wiring board. Here, in Comparative Examples 1 to 4, a pressure-sensitive toner having a volume fraction of 1% or more of pressure-sensitive toner particles having a particle diameter of 16 μm or more is used. As a result, the size of the pressure-sensitive toner particles contained in the pressure-sensitive toner becomes non-uniform, and a portion of the pressure-sensitive toner that receives a small pressure from the foil is generated. Is considered to have occurred.

[Results of semiconductor device operation evaluation]
The results of operation evaluation of the semiconductor elements are shown in Table 2.
In any of Examples 1 to 4, light emission of the light emitting diode 300 was confirmed in the integrated circuit.
On the other hand, in Comparative Example 2, the light emission of the light emitting diode 300 was not confirmed in the integrated circuit. Here, in Comparative Example 2, shrinkage (shrink) occurred in the wiring board as will be described later. This shrinkage affected the reception of radio waves by the integrated circuit, and the light emitting diode 300 did not emit light. It is thought that.

[Results of insulation evaluation between stacked wires]
Table 2 shows the results of the insulation evaluation between the wirings stacked one above the other.
In any of Examples 1 to 4, continuity was not confirmed between the upper and lower wiring layers. This is considered to be because pressure-sensitive toner having insulating properties is provided between the wirings stacked one above the other, and indicates that the wirings can be multilayered.

[Evaluation result of deformation on wiring board]
Table 1 shows the evaluation results of the presence or absence of deformation in the wiring board.
Neither deformation nor wrinkle was confirmed on any of the wiring boards of Examples 1 to 4.

  On the other hand, occurrence of shrinkage (shrink) was confirmed in the wiring board of Comparative Example 2. This is because, in Comparative Example 2, when the foil was pressed against a resin sheet as a substrate at 80 ° C. higher than 70 ° C., the amount of heat received by the resin sheet was large and the resin sheet was deformed. Conceivable.

[Evaluation results of fixing properties of foil]
The evaluation results of the fixing property of the foil are shown in Table 1.
In any of the wiring boards of Examples 1 to 4, the foil did not float from the wiring board. In particular, in the wiring boards of Examples 1 to 3, even when the foil was rubbed with a nail, the foil was not peeled off. This is because the pressure-sensitive toner used in Examples 1 to 3 satisfies the above formula (1) and has a remarkable baroplastic characteristic, and when the pressure-sensitive toner is pressed against the foil, This is thought to be because the viscosity tends to decrease and the adhesive force of the pressure-sensitive toner to the foil is strong.

  On the other hand, in the wiring board of Comparative Example 4, a part of the foil floated from the wiring board. This is because the toner used in Comparative Example 4 (the toner used for adhering the foil) does not have a core-shell structure and does not satisfy the above formula (1), and does not have so-called plasticity. This is considered to be because the viscosity of the toner does not decrease even when the foil is pressed against the toner at a temperature of 70 ° C. or lower, and the adhesive strength of the toner to the foil is weak.

[Evaluation result of presence or absence of foil formed on heat-fixed toner image]
Table 1 shows the evaluation results of the presence or absence of a foil formed on the heat-fixed toner image.
In the wiring boards of Examples 1, 2, and 4, no foil was formed on the heat-fixed toner image.

  In contrast, in the wiring substrate of Comparative Example 2, a part of the foil was formed on the heat-fixed toner image. In Comparative Example 2, when the foil is pressed against the paper at 100 ° C. higher than 70 ° C., the viscosity of the heat fixing toner of the heat fixing toner image formed on the paper decreases. This is probably because the heat fixing toner adhered to the foil.

  According to the results of Examples 1 to 4 and Comparative Examples 1 to 4, this toner image was formed on a substrate on which a toner image of toner having a particle size of 16 μm or more and a volume fraction of toner of less than 1% was formed. It was confirmed that it was necessary to form a foil on the top.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 10 ... Image forming part, 70 ... Pressure-sensitive toner image forming part, 80 ... Foil forming part, 100 ... Foil

Claims (11)

A preparation step of preparing a substrate on which a toner image of a toner having a volume fraction of particles having a particle diameter of 16 μm or more is less than 1%;
A foil forming step of forming a foil on the toner image on the substrate;
A method for manufacturing a wiring board, comprising: The toner image is a plastic toner image having plasticity,
2. The foil forming step, wherein the foil is formed on the plastic toner image against the substrate by pressing and pressing the foil against the substrate at a temperature of 70 ° C. or less. The manufacturing method of the wiring board as described.   3. The method of manufacturing a wiring board according to claim 2, wherein the plastic toner of the plastic toner image is a pressure-sensitive toner whose viscosity decreases when pressed against the foil at a temperature of 70 [deg.] C. or less. The pressure-sensitive toner includes a first resin and a second resin having different glass transition temperatures,
The method for manufacturing a wiring board according to claim 3, wherein the first resin and the second resin are phase-separated.   5. The pressure-sensitive toner has a core-shell structure having a core part in which the first resin and the second resin are phase-separated and a covering part covering the core part. Wiring board manufacturing method. The first resin has a glass transition temperature higher than that of the second resin,
6. The method for manufacturing a wiring board according to claim 5, wherein, in the covering portion, the total amount of the mass parts of the first resin is larger than the total amount of the mass parts of the second resin. The method of manufacturing a wiring board according to claim 6, wherein the pressure-sensitive toner satisfies the following formula (1).
20 ° C. ≦ T (1 MPa) −T (10 MPa) Formula (1)
(In Formula (1), T (1 MPa) indicates the temperature at which the viscosity of the pressure-sensitive toner becomes 10 ⁴ Pa · s at an applied pressure of 1 MPa, and T (10 MPa) indicates the pressure-sensitive pressure at an applied pressure of 10 MPa. (Indicates the temperature when the viscosity of the toner reaches 10 ⁴ Pa · s)   In the foil forming step, the foil is pressed against the area of the substrate wider than the area where the toner image is formed, and pressed against the substrate on the toner image. The method of manufacturing a wiring board according to claim 1, wherein:   2. The foil forming step, wherein the foil is formed on the toner image with respect to the substrate by pressing and pressing the integrally formed film-like foil against the substrate. A method for manufacturing a wiring board according to claim 8.   In the foil forming step, the foil holding unit that holds a plurality of powdered foils is pressed against the substrate and pressed to form the foil on the toner image on the substrate. A method for manufacturing a wiring board according to claim 8. A wiring board preparation step of preparing the wiring board according to any one of claims 1 to 10,
An attachment process for attaching a semiconductor element to the wiring board;
A method for manufacturing an integrated circuit, comprising: