WO2011105582A1 - スクリーン印刷用メッシュ部材 - Google Patents
スクリーン印刷用メッシュ部材 Download PDFInfo
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- WO2011105582A1 WO2011105582A1 PCT/JP2011/054393 JP2011054393W WO2011105582A1 WO 2011105582 A1 WO2011105582 A1 WO 2011105582A1 JP 2011054393 W JP2011054393 W JP 2011054393W WO 2011105582 A1 WO2011105582 A1 WO 2011105582A1
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- WIPO (PCT)
- Prior art keywords
- printing
- mesh member
- metal foil
- aperture ratio
- rolled metal
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/24—Stencils; Stencil materials; Carriers therefor
- B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/04—Printing plates or foils; Materials therefor metallic
Definitions
- the present invention relates to a mesh member used for screen printing, and in particular, in printing using a high-viscosity paste used for printing on a surface electrode of a solar cell, there is no printing blur and there is little difference in height, and printing position accuracy is high.
- the present invention relates to a mesh member for screen printing that realizes high printing.
- Screen printing is used not only for the production of electronic components such as multilayer chip capacitors, but also for the formation of current collecting main electrodes (bus bars) and current collecting grid electrodes (finger electrodes), which are the surface electrodes of solar cells.
- mesh members knitted with fine wires made of metal or resin are used for printing plates (screen plates) used for screen printing.
- a mesh fabric knitted with fine polyester wires hereinafter sometimes referred to as “polyester mesh fabric”
- metal mesh fabric woven with stainless steel fine wires
- the combination mask is made by attaching a mesh fabric woven with polyester fine wires on an aluminum formwork, bonding the metal mesh fabric, and cutting the polyester mesh fabric overlapping the metal mesh fabric after drying. Thereafter, a photosensitive emulsion is applied, and a desired printing pattern is exposed and developed on a metal mesh fabric to produce a printing plate.
- the amount of the paste to be transmitted increases as the aperture ratio (the total area ratio of the openings shown in FIG. 1 described later) increases.
- a metal mesh fabric having an aperture ratio of about 50 to 60% is used for printing the surface electrodes of solar cells.
- the power generation efficiency is improved by reducing the electrode resistance while increasing the light receiving area of the surface electrode of the solar cell. For this reason, efforts have been made to increase the aspect ratio of the surface electrode as much as possible, that is, the electrode width is narrow and the electrode height is high. However, when the printing width is as narrow as about 50 ⁇ m, screen printing using a metal mesh fabric does not sufficiently discharge the paste, and the printed electrode height may be low.
- FIG. 1 is a partially enlarged explanatory view of a printing plate usually used for screen printing.
- a mesh member (mesh fabric) knitted with fine wires 1 made of metal or polyester is stretched on a screen frame (not shown)
- resin 4 photosensitive emulsion
- the photosensitive emulsion 4 is cured by exposing only the part, and the photosensitive emulsion 4 in the part to be printed is removed to produce a printing plate 5 [in the figure, 2 is the opening of the mesh member (mesh opening). Show].
- the resin 4 (photosensitive emulsion) is about 10 to 30 ⁇ m thicker than the mesh member.
- a method for manufacturing a mesh member As a method for manufacturing a mesh member, a method of depositing nickel or the like in a mesh shape by electroforming has been proposed (for example, Patent Documents 2 and 3). However, it is known that the metal foil produced by the electroforming method has a variation in strength, and the mesh produced by the electroforming method may have a variation in strength. In addition, it is conceivable to use a mesh member formed by punching an electrolytic foil such as nickel by etching or the like. However, as in the case of a mesh member formed by electroforming, variation in strength occurs.
- the present invention has been made in view of such a situation, and the object thereof is that even when a high-viscosity paste is used, printing is not blurred and printing can be performed with little difference in height, and high printing position accuracy is achieved. Is to provide a mesh member for screen printing.
- a mesh member for screen printing for forming a printing pattern with a photosensitive emulsion
- the mesh member for screen printing is composed of a rolled metal foil and corresponds to a printing region of a printing object.
- the foil portion has a large number of holes so as to spread toward the printing object, the line portion maximum width A on the printing object side in the portion of the rolled metal foil corresponding to the printing region, and the holes and holes.
- a mesh member for screen printing wherein a maximum line width coefficient defined by a ratio (A / B) of the interval B is less than 0.40.
- the rolled metal foil has a portion corresponding to a non-printing area of the printing object in addition to a portion corresponding to the printing area of the printing object, and a hole is formed in the portion corresponding to the non-printing area.
- the mesh member according to (1) which is not provided.
- the rolled metal foil has a portion corresponding to a non-printing area of the printing object in addition to a portion corresponding to the printing area of the printing object, and the portion corresponding to the non-printing area includes a printing area.
- the mesh member according to (1) wherein a large number of holes are formed with an opening ratio smaller than the opening ratio of the holes in the corresponding part.
- the outline of the boundary between the portion of the rolled metal foil corresponding to the printing region and the portion of the rolled metal foil corresponding to the non-printing region is at least partially rounded (2) to (5 ) The mesh member according to any one of the above.
- the rolled metal foil is one of (1) to (7) selected from the group consisting of stainless steel, titanium, titanium alloy, nickel, nickel alloy, copper, copper alloy, and aluminum alloy The mesh member as described in any one.
- the mesh member for screen printing of the present invention is defined by the ratio (A / B) of the line portion maximum width A on the printing object side in the portion of the rolled metal foil corresponding to the printing region and the hole-to-hole interval B. Since the maximum line width coefficient is properly defined, even when using a high-viscosity paste, there is no blurring, printing with little difference in height, and screen printing that provides high printing position accuracy.
- the mesh member for screen printing can be used for the manufacture of electronic components, the main electrode for current collection (bus bar), which is the surface electrode of solar cells, and the grid electrode (finger electrode) for current collection. Very useful for formation.
- FIG. 1 is a partially enlarged explanatory view of a printing plate usually used for screen printing.
- FIGS. 2A to 2C are diagrams for explaining a filling state of paste in screen printing according to a conventional technique.
- FIG. 3 is an enlarged view for explaining the opening shape of the hole.
- FIG. 4 is an enlarged view for explaining another opening shape of the hole.
- FIG. 5 is a graph showing the relationship between the minimum cross-sectional area per unit width (mm 2 / cm) and the tensile strength per unit width (N / cm).
- 6 (a) to 6 (b) are explanatory diagrams showing an example of the form of the mesh member of the present invention.
- 7 (a) to 7 (c) are explanatory views showing other examples of the shape of the mesh member of the present invention.
- FIG. 8 is an explanatory view showing still another example of the form of the mesh member of the present invention.
- FIGS. 9A to 9C are diagrams for explaining the filling state of the paste in screen
- the inventors of the present invention have investigated the reason why the metal mesh fabric, which is the prior art, cannot perform good thick film printing when the printing pattern is thin.
- a conductive silver paste Toyo Ink Manufacturing Co., Ltd .: “RAFS” was used as the paste.
- etching is optimal in terms of opening accuracy and opening speed.
- the shape of the hole is such that the hole expands from one side to the other side, but the paste may stay by forming the hole so as to expand toward the printing object. Can be avoided.
- the viscosity of the paste is 1000 Pa ⁇ s
- the paste is completely discharged from the mesh member 20 msec after passing through the squeegee, whereas In this case, even after 25 msec after the squeegee passed, a part of the paste adhered to the printing surface side of the mesh member, and the difference in ejection properties was more remarkable.
- the difference between the aperture ratio on the printing surface side and the aperture ratio on the squeegee surface side can be about 5 to 80%. Considering the paste dischargeability and the like, it is preferably about 20 to 50%.
- the present inventors sprayed an etching solution from only one side on a rolled stainless steel foil (Toyo Seiki Co., Ltd .: Standard SUS304-H) having a thickness of 16 ⁇ m to produce a mesh member.
- the interval (pitch) between the holes was 80 ⁇ m [number of meshes: 320 (lines / inch)].
- the aperture ratio of one surface was 64%, and the aperture ratio of the other surface was 32% (average aperture ratio of both surfaces was 48%).
- the observation was performed using a microscope in the same manner as the paste printing process of the metal mesh fabric.
- the discharge of the paste is more uniform than the mesh member constituted by the metal mesh fabric.
- the rolled metal foil mesh member no paste remained in the holes (openings) as observed in the fine wire mesh fabric. Note that no paste remained in both the case where the holes were expanded toward the printing surface side and the case where the holes were narrowed on the printing surface side.
- a rolled metal foil mesh member is manufactured by punching a stainless steel rolled foil (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H) on one side of the printed material with a thickness of 21 ⁇ m by etching.
- a printing test was performed using a printing plate prepared so that the holes widened and a printing plate prepared such that the holes narrowed on the printing surface side.
- the opening ratio of one surface of the mesh member was 73%, and the opening ratio of the other surface was 37% (average opening ratio of both surfaces was 55%).
- the outer shape of the hole was formed so as to spread toward the printing object.
- the present inventors also conducted a printing test in order to evaluate the printability of the rolled metal foil mesh member. Holes are punched by etching from one side into rolled stainless steel foils with a thickness of 16 ⁇ m and 21 ⁇ m (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H). A mesh member having a different size was produced. As a result of etching from one side, the opening ratio on the side sprayed with the etching solution is high, and the opening ratio on the opposite surface is low.
- the aperture ratios (opening ratio on the printing surface side) shown in Table 1 below were calculated from the opening width on the printing surface side (opening width of the hole: ⁇ m) 2 / pitch ( ⁇ m) 2 ⁇ 100 (%). Is. Further, when the hole shape is widened toward the printing surface side (printing object side) as in the mesh member of the present invention, the aperture ratio is different between the printing surface side and the squeegee side. Unless otherwise specified, the aperture ratio of such a mesh member is an average value of the aperture ratio on the printing surface side and the aperture ratio on the squeegee side.
- the maximum width A of the line portion at which the distance between the holes on the printing surface side becomes the maximum is determined, and the interval (pitch) B between the holes.
- FIG. 3 shows the opening shape of the hole (opening) in the mesh member of the present invention.
- a large number of holes (opening shape) are formed in a substantially quadrangular shape (the shape corresponding to the printing area of the mesh member is a lattice shape) as shown in FIG.
- the four corners of the hole 2 are rounded, but in such a shape, the widest part of the line part 1a is the line part maximum width A, This line portion maximum width A affects the characteristics of the mesh member.
- interval (pitch) B of a hole means the distance from one side of a certain hole 2 to one side of the other adjacent hole 2 as shown in FIG.
- FIG. 3 assumes an opening shape in which the portions where the line portions 1a intersect each other have a cross shape.
- the portions where the line portions 1a intersect each other are substantially omitted.
- the opening shape may be a T-shape.
- the maximum width of the line portions varies depending on the direction (A and C shown in FIG. 4).
- the shape of the holes is basically the same in the printing region, and the holes are formed at equal intervals.
- the size of the holes and the interval between the holes may be changed.
- the line width on the squeegee surface side is secured and the necessary strength is maintained.
- the line width on the squeegee surface side is preferably 15 ⁇ m or more.
- the difference between the line width on the printing surface side and the line width on the squeegee side is usually preferably about 5 to 30 ⁇ m, more preferably about 10 to 20 ⁇ m.
- the maximum line width coefficient maximum line width A ⁇ pitch B
- the test No. A printing plate having a printing pattern width of 50 ⁇ m was prepared using 4 to 8, and a printing test was performed using the same conductive silver paste to evaluate the presence or absence of printing blur and variation in printing width.
- the variation in the printing width at this time was determined by measuring the maximum printing width and the minimum printing width with a laser microscope (manufactured by Keyence Corporation: model VK-9700) and measuring the difference. The results are shown in Table 2 below.
- the aperture ratio means the average aperture ratio of the aperture ratio of one surface and the aperture ratio of another surface (hereinafter, when the aperture ratio of one surface is different from the aperture ratio of another surface, the average aperture ratio is Simply referred to as the aperture ratio). Therefore, in screen printing using a rolled metal foil mesh and a high-viscosity paste, it is desirable to increase the aperture ratio of the region through which the paste permeates. When printing is performed using a paste having a relatively high viscosity among conductive silver pastes, it is desirable that the aperture ratio be 50% or more, ideally 70% or more. However, since an excessively high aperture ratio leads to a decrease in strength of the mesh member, it is preferably about 80% when the thickness is 15 ⁇ m and about 85% when the thickness is 20 ⁇ m.
- the rolled metal foil has a portion corresponding to the non-printing area of the printing object, in addition to the portion corresponding to the printing area of the printing object, and a portion corresponding to the non-printing area.
- the rolled metal foil has a portion corresponding to the non-printing area of the printing object in addition to the part corresponding to the printing area of the printing object.
- the portion corresponding to the non-printing area includes a form in which a large number of holes are formed with an opening ratio smaller than the opening ratio of the hole in the part corresponding to the printing area.
- these forms increase the opening ratio.
- it is comprised from a viewpoint of improving intensity
- the inventors of the present invention have developed a rolled metal foil mesh with a 55% aperture ratio obtained by punching the entire surface of a rolled stainless steel foil having a thickness of 16 ⁇ m (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H), and a printing pattern.
- a rolled metal foil mesh having an aperture ratio of 55% only in an area (150 mm ⁇ 150 mm) for exposing and a peripheral aperture ratio of 5% was produced.
- Two kinds of rolled metal foil meshes were adhered to a polyester fine wire mesh that was stretched on an aluminum frame with a tension of 0.65 mm and a tension gauge (manufactured by Tokyo Process Service Co., Ltd .: model STG75B).
- the polyester fine wire mesh in the rolled metal foil mesh part was cut off, and the rolled metal foil mesh was observed to break.
- the rolled metal foil mesh having a high aperture ratio only in the printed pattern region was not broken, but the rolled metal foil mesh having the same overall aperture ratio was broken.
- the aperture ratio of the area for the printing pattern (that is, the rolled metal foil portion corresponding to the printing area of the printing object) is increased, and the other areas
- the aperture ratio of the rolled metal foil corresponding to the non-printing area of the printing object (hereinafter referred to as “printing area-corresponding part”), the opening area of the printing object is reduced.
- non-printing area corresponding portion the portion corresponding to the non-printing area of the printing object. It was found that the durability against the tension during the production of the combination mask can be improved because of the low aperture ratio.
- the strength of the joint with the polyester fine wire mesh where stress is concentrated during printing can be increased, so the life of the mesh can be increased. It can be expected to improve.
- a part of the printing object may be mixed on the printing object, and the mesh member may be broken when contacting the squeegee during printing, and the mesh member may break.
- the test which compares the durability with respect to the contamination foreign material of a fine wire (metal) mesh fabric and a rolled stainless steel foil was implemented.
- the metal mesh fabric had a wire diameter of 18 ⁇ m, a thickness of 20 ⁇ m, and an aperture ratio of 50%, and the rolled stainless steel foil had a thickness of 21 ⁇ m.
- Each was placed on a piece of silicon having a height of 3 mm, passed through a squeegee, and then observed with a microscope (manufactured by Keyence Corporation: Model VHX-2000).
- the stainless steel fine wire was broken, whereas the rolled stainless steel foil was not broken. That is, it was found that the stainless steel foil is higher in durability against foreign matters such as silicon pieces than the metal mesh fabric. Therefore, by reducing the aperture ratio of the portion corresponding to the non-printing region of the rolled metal foil mesh, the portion corresponding to the non-printing region is improved in durability against mixed foreign matters, and even when foreign matters are mixed during printing, the mesh member Can be expected to be difficult to break.
- the area around the printed pattern area through which the paste permeates (the non-printed area corresponding portion) has an aperture ratio of 0% (that is, a rolled metal foil in which no holes are formed) Itself). That is, by not forming a hole in a portion corresponding to the non-printing region of the rolled metal foil, the strength is sufficient.
- the adhesiveness with the rolled metal foil is lowered, and there is a concern that the photosensitive emulsion may be peeled off during repeated printing. For this reason, it is preferable to set the aperture ratio of the portion corresponding to the non-printing area in consideration of the adhesiveness of the photosensitive emulsion (and the type of rolled metal foil that affects the adhesiveness).
- the opening width of at least a part of the hole provided in the portion corresponding to the non-printing region is larger than the opening width of the hole provided in the portion corresponding to the printing region.
- the opening width of at least a part of the holes provided in the non-printing region corresponding portion is larger than the opening width of the hole provided in the printing region corresponding portion.
- the thickness of the mesh member (that is, the thickness of the rolled metal foil) is preferably 30 ⁇ m or less, which is preferable for printing with a small difference in height.
- This thickness is more preferably 10 ⁇ m or more from the viewpoint of securing strength.
- the mesh member when the thickness of the printing plate is the same, the higher the aperture ratio of the portion corresponding to the printing area, the thicker the printing can be performed. However, increasing the aperture ratio decreases the strength of the mesh member. Therefore, using a mesh member with different aperture ratio and strength, the mesh member was pulled with a metal clamp simulating an aluminum frame for screen printing, and a load test was performed. In this load test, in a state where the mesh member is pulled, a urethane rubber squeegee for screen printing sandwiched between chucks using a compression tester (Instron) is pressed against the mesh member in the same manner as during screen printing. It was observed whether it was able to withstand the tension applied to the mesh member and the printing pressure of the squeegee.
- a compression tester Instron
- the breaking load (N) when the tensile test is performed is converted per 1 cm of the width of the tensile test piece) is 20 N / cm or more
- the mesh It was found that the member did not break.
- the tensile strength of the mesh member is preferably 20 N / cm or more.
- a test piece having a width of 15 mm and a mark distance of 100 mm was cut out from the mesh member, and a tensile test was performed at a tensile rate of 10 mm / min using a tensile tester (Orientec Co., Ltd.). Carried out.
- the aperture ratio of the portion corresponding to the printing area is less than 25%, print fading is likely to occur. Therefore, the aperture ratio is preferably 25% or more. Further, since the tensile strength per unit width of the mesh member is preferably 20 N / cm or more, even when the thickness is different, the opening ratio (at the maximum opening calculated) at least the tensile strength per unit width is 20 N / cm. Ratio) must be the following aperture ratio. As a result of the test, the tensile strength per unit width of the mesh member produced by perforating the rolled metal foil is proportional to the minimum cross-sectional area per unit width (mm 2 / cm: equivalent to the cross-sectional area of the line portion). I understood that. FIG.
- the aperture ratio of the mesh member (the aperture ratio of the portion corresponding to the printing area) is 25% or more, which is an aperture ratio necessary for screen printing, and a tensile strength of 20 N / cm or more per unit width is secured. It is preferable that the aperture ratio is equal to or less than the calculated maximum aperture ratio calculated by the above equation (1).
- the mesh member of the present invention defines the maximum line width coefficient of the portion corresponding to the printing area, and includes those having the non-printing area corresponding portion for ensuring the strength, but there are various forms. Is mentioned.
- FIGS. 6A and 6B are explanatory views showing an example of the form of the mesh member of the present invention, and FIG. 6A is a plan view (the holes corresponding to the non-printing area are not shown).
- FIG. 6B is a partially enlarged view thereof.
- the mesh member 10 has a non-printing region equivalent portion 12 (a portion with a low aperture ratio) around a printing region equivalent portion 11 (a portion with a high aperture ratio).
- the mesh member 10 of the present invention has a print region equivalent portion 11 (a portion with a high aperture ratio) at the center and a non-print region equivalent portion 12 (a portion with a low aperture ratio) around it.
- FIG. 7 (a) which has a plurality of print region equivalent portions 11 (portions in which the aperture ratio increases) in the central portion, and a non-print region equivalent portion 12 (a portion in which the aperture ratio decreases) in the periphery. What has [FIG.
- the stress concentration during tension is Analysis was performed by a finite element method (FEM).
- FEM finite element method
- the center portion of the mesh member is 86.8 MPa
- the corner portion was 128.3 MPa, and it was found that stress was concentrated on the corner portion.
- the mesh member breaks during pulling, there is a high possibility that the mesh member breaks from the corner portion of the boundary between the region with a high aperture ratio and the region with a low aperture ratio.
- the angle of the corner portion is larger than 90 degrees (a rounded shape)
- the stress of the corner portion is 104.5 MPa, which is a stress compared to the case where the corner portion is 90 degrees. I found out I didn't concentrate.
- the outline of the boundary between the areas 11 and 12 having different aperture ratios is formed by removing the corners and rounding at least partially. Stress concentration can be reduced, and a mesh member that is difficult to break can be obtained. In particular, it can be expected that even when the mesh member is thin (about 30 ⁇ m or less), the aperture ratio in a region with a high aperture ratio is increased, and even when the mesh member is stretched with a higher tension, breakage can be prevented.
- the boundary D between the print area equivalent portion and the non-print area equivalent portion is set based on the end of the opening of the print area equivalent portion. This is a reference for calculating the aperture ratios of the corresponding portion and the non-printing region corresponding portion.
- the aperture ratio of a portion with a low aperture ratio may be high near a portion with a high aperture ratio, and may decrease with increasing distance.
- Each part in the mesh member of the present invention is a range where the aperture ratio is the same in the rolled metal foil, and a range where the aperture ratio is different is a different part. Even if the aperture ratio is the same, if the aperture ratio is divided at different parts, it is regarded as another part (for example, a plurality of parts with a high aperture ratio are scattered in parts with a low aperture ratio. If you want to).
- the aperture ratio is gradually changed (usually increased) toward a portion with a high aperture ratio for exposing the printed pattern, the range for each aperture ratio is regarded as one area, and the area with a high aperture ratio is A plurality of regions exist.
- the material of the rolled metal foil is not particularly limited as long as it can be made into a foil shape using stainless steel, titanium or titanium alloy, nickel or nickel alloy, copper or copper alloy, aluminum alloy, or the like.
- stainless steel titanium or titanium alloy, nickel or nickel alloy, copper or copper alloy, aluminum alloy, or the like.
- SUS304-H for stainless steel JIS4600 80 for titanium alloy, JISCS2520 (1986) NCHRW1 for nickel alloy, JIS3130 C1720R-H for copper alloy, aluminum alloy, etc.
- Examples include JISH4000 5052.
- such a rolled metal foil is generally commercially available and can be easily obtained.
- the mesh member of the present invention it is preferable to form a large number of holes extending toward the printing object by etching in the rolled metal foil.
- at least one surface constituting the line portion is at least one side.
- the squeegee 6 has a flat surface compared to a mesh knitted with fine lines having irregularities on the surface. The movement becomes smooth [FIG. 9 (a)], the paste 7 is easily stretched uniformly [FIG. 9 (b)], and a pattern having a relatively thick printed film thickness d2 can be printed, which is preferable [FIG. 9 (c)].
- 9A to 9C also show a state in which the outer shape of the hole 2 is formed so as to expand toward the printing surface side (the lower side of FIG. 9A) (FIG. 9).
- the upper side of (a) is the squeegee side).
- the mesh member of the present invention it is preferable to form a large number of holes in the rolled metal foil by a hole forming process by etching, and the procedure is as follows. First, a state in which a rolled metal foil is stretched and attached to a fixed plate having a flat surface such as glass, or a roll in which the rolled metal foil is wound is stretched, that is, the rolled metal foil has no wrinkles. The following processing is performed in a stretched state. First, a photosensitive resist is applied as thinly as possible to the rolled metal foil, and then the opening pattern of the mesh drawn on the mask is exposed and developed to form the opening pattern on the rolled metal foil.
- a mesh member having a non-printing area equivalent part in addition to the printing area equivalent part, and having a large number of holes in the non-printing area equivalent part with an opening ratio smaller than the opening ratio of the hole in the printing area equivalent part.
- Example 1 A rolled metal foil mesh was prepared by punching a commercially available rolled stainless steel foil having a thickness of 16 ⁇ m (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H) by etching from one side.
- the area with a high aperture ratio is a shape that matches the shape of the surface electrode pattern of the solar cell, and the portion where the finger electrode print pattern is exposed / developed is exposed to a width of 500 ⁇ m, a length of 150 mm, and a bus bar pattern.
- the part to be developed has a width of 2.4 mm and a length of 150 mm.
- the shape of the hole is a shape in which the opening widens toward the printing surface side.
- the pitch on the printing surface side of the portion with a high aperture ratio (corresponding to the printing region) is 80 ⁇ m, the line portion maximum width A on the printed material side is 27 ⁇ m, and the maximum line width coefficient is 0.34.
- the aperture ratio is 62% for a portion with a high aperture ratio (portion corresponding to a printing region) and 12% for a portion with a low aperture ratio (portion corresponding to a non-printing region).
- the boundary between the high aperture ratio portion and the low aperture portion is linear.
- this mesh member was joined to a polyester fine wire mesh, and after applying a photosensitive emulsion, a printing pattern having a finger electrode width of 100 ⁇ m and a bus bar width of 2 mm was exposed and developed to prepare a printing plate.
- a printing plate was similarly prepared using a stainless fine wire mesh fabric having a thickness of 35 ⁇ m, a wire diameter of 16 ⁇ m, an aperture ratio of 63%, and a pitch of 78 ⁇ m [number of meshes: 325 (lines / inch)].
- the thickness of the photosensitive emulsion was 20 ⁇ m thicker than the thickness of the mesh member.
- the printing height of the products 1 to 4 of the present invention is 19.2 to 27.3 ⁇ m, which is higher than the comparative product of 13.9 ⁇ m, and the height difference (maximum height-minimum height) of the products of the present invention.
- the product of 4.0 to 6.3 ⁇ m and the comparative product was 8.5 ⁇ m, and the product of the present invention was smaller.
- Example 2 An area with a low aperture ratio is formed on a mask in which an aperture (mesh) pattern with a high aperture ratio is drawn on a commercially available stainless steel rolled foil (made by Toyo Seiki Co., Ltd .: Standard SUS304-H) having a thickness of 21 ⁇ m.
- the film mask for drawing a pattern was overlaid and exposed. After development, holes were formed by etching from one side to produce a rolled metal foil mesh.
- the portion with a high aperture ratio matches the shape of the surface electrode pattern of the solar cell, and the portion that exposes and develops the finger electrode print pattern is the width: 500 ⁇ m, length: 150 mm, and the bus bar pattern is exposed and developed.
- the portion to be made has a width of 2.4 mm and a length of 150 mm.
- the shape of the hole is such that the opening is widened toward the printing surface side.
- the pitch on the printing surface side of the portion with a high aperture ratio is 100 ⁇ m [number of meshes: 250 (lines / inch)], the line portion maximum width A on the printed material side is 30 ⁇ m, and the maximum line width coefficient is 0.30.
- the aperture ratio of the high aperture ratio is 66%, and the low aperture ratio is 9%.
- the boundary between the high aperture ratio portion and the low aperture portion is straight or rounded (see FIG. 8).
- a printing plate was prepared using this mesh member.
- the photosensitive emulsion is 20 ⁇ m thicker than the mesh member.
- RAFS conductive silver paste
- Example 3 A commercially available rolled stainless steel foil having a thickness of 30 ⁇ m (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H) was punched from one side to produce a rolled metal foil mesh.
- a portion with a high aperture ratio is 70 mm ⁇ 70 mm at the center of the mesh member.
- the pitch of the portion with a high aperture ratio is 200 ⁇ m
- the line portion maximum width A on the printed material side is 59 ⁇ m
- the maximum line width coefficient is 0.30.
- the shape of the hole is a shape in which the opening widens toward the printing surface side.
- the aperture ratio of the high aperture ratio is 74%
- the pitch of the low aperture ratio is 300 ⁇ m [85 meshes (inch / inch)]
- the aperture ratio is 9%.
- the boundary between the high aperture ratio portion and the low aperture portion is straight or rounded (see FIG. 8).
- a printing plate was prepared using this mesh member.
- the photosensitive emulsion is 10 ⁇ m thicker than the mesh member. When actual printing was performed using this printing plate, it was confirmed that there was no fading and printing with a height difference of 6 ⁇ m was possible.
- Example 4 A rolled metal foil mesh was prepared by punching a commercially available stainless steel rolled foil (Toyo Seiki Co., Ltd., Standard SUS304-H) having a thickness of 20 ⁇ m by etching from one side.
- the portion with a high aperture ratio matches the shape of the surface electrode pattern of the solar cell, and the portion where the finger electrode print pattern is exposed and developed exposes and develops the width: 500 ⁇ m, length: 150 mm, and the bus bar pattern
- the part has a width of 2.4 mm and a length of 150 mm.
- the pitch of the portion with a high aperture ratio is 100 ⁇ m [number of meshes 250 (lines / inch)], the line portion maximum width A on the printed material side is 20 ⁇ m, and the maximum line width coefficient is 0.20.
- the opening is widened toward the printing surface, the opening ratio of the portion with a high opening ratio is 86%, and the periphery of the portion with a low opening ratio is a stainless steel rolled foil itself (opening ratio of 0%). .
- the boundary between the high opening ratio and the stainless steel rolled foil itself (opening ratio 0%) is straight or rounded (see FIG. 8).
- a printing plate was prepared using this mesh member.
- the photosensitive emulsion is 10 ⁇ m thicker than the mesh member. When actual printing was performed using this printing plate, it was confirmed that there was no fading and printing with a height difference of 4 ⁇ m was possible.
- Example 5 In order to evaluate the printing position accuracy, a rolled metal foil mesh was prepared by punching a rolled stainless steel foil having a thickness of 16 ⁇ m (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H) by etching from one side.
- the region with a high aperture ratio is 200 mm ⁇ 200 mm at the center of the mesh member.
- the pitch of the area with a high aperture ratio is 80 ⁇ m (mesh is 320 mesh (lines / inch)), the line portion maximum width on the printing object side is 20 ⁇ m, and the maximum line width coefficient is 0.25.
- the hole has a shape that widens toward the printing surface side, the aperture ratio of the high aperture ratio area is 57%, and the periphery of the high aperture ratio area is the rolled stainless steel foil itself (open area ratio of 0%). ing.
- the boundary between the region with a high aperture ratio and the rolled stainless steel foil itself (the aperture ratio is 0%) is straight or rounded (see FIG. 8).
- the printing position 5000 printing positions were measured.
- the printing position deviation from the first printing position is within ⁇ 15 ⁇ m
- the printing position deviation in the conventional metal mesh fabric is ⁇ 30 ⁇ m (for example, “Electronic High Quality Screen Printing Technology” supervised by Takao Someya , 2005, p. 44). From this result, it can be seen that a mesh member obtained by perforating a rolled metal foil can achieve high printing accuracy.
- the mesh member for screen printing of the present invention is defined by the ratio (A / B) of the line portion maximum width A on the printing object side in the portion of the rolled metal foil corresponding to the printing region and the hole-to-hole interval B. Since the maximum line width coefficient is properly defined, a mesh member for screen printing that can print with little height difference and obtain high printing position accuracy even when using a high-viscosity paste is realized. Such a screen printing mesh member is extremely useful for the manufacture of electronic components and the formation of current collecting main electrodes (bus bars) and current collecting grid electrodes (finger electrodes), which are surface electrodes of solar cells. is there.
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- Manufacturing Of Printed Wiring (AREA)
Abstract
Description
(1)感光性乳剤で印刷パターンを形成するためのスクリーン印刷用メッシュ部材であって、前記スクリーン印刷用メッシュ部材は圧延金属箔によって構成されており、印刷対象物の印刷領域に相当する圧延金属箔の部分に、印刷対象物に向かって広がるように多数の孔を有し、前記印刷領域に相当する圧延金属箔の部分における印刷対象物側の線部最大幅Aと、前記孔と孔の間隔Bの比(A/B)で規定される最大線幅係数が0.40未満であることを特徴とするスクリーン印刷用メッシュ部材。
(2)前記圧延金属箔は、印刷対象物の印刷領域に相当する部分以外に、印刷対象物の非印刷領域に相当する部分を有し、該非印刷領域に相当する部分には孔が開けられていないものである(1)に記載のメッシュ部材。
(3)前記圧延金属箔は、印刷対象物の印刷領域に相当する部分以外に、印刷対象物の非印刷領域に相当する部分を有し、該非印刷領域に相当する部分には、印刷領域に相当する部分における孔の開口率よりも小さい開口率で多数の孔が開けられたものである(1)に記載のメッシュ部材。
(4)前記印刷領域に相当する圧延金属箔の部分における印刷対象物側の線部最大幅Aが30μm未満である(1)~(3)のいずれか一つに記載のメッシュ部材。
(5)厚みが5μm以上、30μm以下である(1)~(4)のいずれか一つに記載のメッシュ部材。
(6)前記印刷領域に相当する圧延金属箔の部分と、該非印刷領域に相当する圧延金属箔の部分の境界の輪郭は、少なくとも一部が丸みを帯びたものである(2)~(5)のいずれか一つに記載のメッシュ部材。
(7)線部を構成する少なくとも片面が平坦である(1)~(6)のいずれかに記載のメッシュ部材。
(8)前記圧延金属箔は、ステンレス鋼、チタン、チタン合金、ニッケル、ニッケル合金、銅、銅合金、およびアルミ合金から成る群から選択される1種からなる(1)~(7)のいずれか一つに記載のメッシュ部材。
厚さ16μmの市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)に片側からエッチングで孔開け加工し、圧延金属箔メッシュを作製した。開口率の高い領域は、太陽電池の表面電極パターンの形状に合わせた形状であり、フィンガー電極の印刷パターンを露光・現像する部分は、幅:500μm、長さ:150mm、バスバーのパターンを露光・現像する部分は、幅:2.4mm、長さ150mmとなっている。また、孔の形状は、印刷面側に向かって開口が広がる形状となっている。開口率の高い部分(印刷領域相当部分)の印刷面側のピッチは80μm、印刷物側の線部最大幅Aは27μm、最大線幅係数は0.34となっている。開口率は、開口率の高い部分(印刷領域相当部分)は62%、開口率の低い部分(非印刷領域相当部分)は12%となっている。開口率の高い部分と低い部分間の境界は直線状となっている。
厚さ21μmの市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)に、開口率が高い領域の開口(メッシュ)パターンを描画したマスクの上に、開口率の低い領域のパターンを描画するためのフィルムマスクを重ね合わせて露光した。現像後、片側からエッチングで孔開け加工し、圧延金属箔メッシュを作製した。開口率の高い部分は、太陽電池の表面電極パターンの形状に合わせた形状で、フィンガー電極の印刷パターンを露光・現像する部分は、幅:500μm、長さ:150mm、バスバーのパターンを露光・現像する部分は幅:2.4mm、長さ:150mmとなっている。また孔の形状は、印刷面側に向かって開口が広がる形状となっている。開口率の高い部分の印刷面側のピッチは100μm[メッシュ数:250(本/インチ)]、印刷物側の線部最大幅Aは30μm、最大線幅係数は0.30となっている。
厚さ30μmの市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)に片側からエッチングで孔開け加工し、圧延金属箔メッシュを作製した。開口率の高い部分はメッシュ部材の中央部で、70mm×70mmとなっている。開口率の高い部分のピッチは200μm、印刷物側の線部最大幅Aは59μm、最大線幅係数は0.30となっている。また孔の形状は、印刷面側に向かって開口が広がる形状となっている。開口率の高い部分の開口率は74%、開口率の低い部分のピッチは300μm[メッシュ数85(本/インチ)]、開口率は9%となっている。開口率の高い部分と低い部分間の境界は直線または丸みを帯びている(前記図8参照)。このメッシュ部材を用いて印刷版を作成した。なお、感光性乳剤の厚さはメッシュ部材の厚さよりも10μm厚い。この印刷版を使って実際の印刷を行ったところ、印刷かすれがなく、高低差が6μmの印刷ができることが確認できた。
厚さ20μmの市販のステンレス鋼圧延箔(東洋精箔株式会社製、規格SUS304-H)に片側からエッチングで孔開け加工し、圧延金属箔メッシュを作製した。開口率の高い部分は太陽電池の表面電極パターンの形状に合わせた形状で、フィンガー電極の印刷パターンを露光・現像する部分は、幅:500μm、長さ:150mm、バスバーのパターンを露光・現像する部分は、幅:2.4mm、長さ:150mmとなっている。開口率の高い部分のピッチは100μm[メッシュ数250(本/インチ)]、印刷物側の線部最大幅Aは20μm、最大線幅係数は0.20となっている。印刷面側に向かって開口が広がる形状となっており、開口率の高い部分の開口率は86%、開口率の低い部分の周辺はステンレス鋼圧延箔そのもの(開口率0%)となっている。開口率の高い部分とステンレス鋼圧延箔そのもの(開口率0%)の境界は直線または丸みを帯びている(前記図8参照)。このメッシュ部材を用いて印刷版を作成した。なお、感光性乳剤の厚さはメッシュ部材の厚さよりも10μm厚い。この印刷版を使って実際の印刷を行ったところ、印刷かすれがなく、高低差が4μmの印刷ができることが確認できた。
印刷位置精度を評価するため、厚さ16μmの圧延ステンレス鋼箔(東洋精箔株式会社製:規格SUS304-H)に、片側からエッチングで孔開け加工し、圧延金属箔メッシュを作製した。開口率の高い領域はメッシュ部材の中央部で、200mm×200mmとなっている。開口率の高い領域のピッチは80μm(メッシュは320メッシュ(本/インチ))、印刷対象物側の線部最大幅は20μm、最大線幅係数は0.25となっている。
本出願は、2010年2月26日出願の日本特許出願(特願2010-043159)、2011年2月23日出願の日本特許出願(特願2011-037569)に基づくものであり、その内容はここに参照として取り込まれる。
1a 線部
2 孔(開口部)
3 印刷パターン部
4 感光性乳剤
5 印刷版
6 スキージ
7 ペースト
7a 滲み
8 印刷対象物
10 メッシュ部材
11 印刷領域相当部分
12 非印刷領域相当部分
Claims (9)
- 感光性乳剤で印刷パターンを形成するためのスクリーン印刷用メッシュ部材であって、前記スクリーン印刷用メッシュ部材は圧延金属箔によって構成されており、印刷対象物の印刷領域に相当する圧延金属箔の部分に、印刷対象物に向かって広がるように多数の孔を有し、前記印刷領域に相当する圧延金属箔の部分における印刷対象物側の線部最大幅Aと、前記孔と孔の間隔Bの比A/Bで規定される最大線幅係数が0.40未満であるスクリーン印刷用メッシュ部材。
- 前記圧延金属箔は、印刷対象物の印刷領域に相当する部分以外に、印刷対象物の非印刷領域に相当する部分を有し、該非印刷領域に相当する部分には孔が開けられていないものである請求項1に記載のメッシュ部材。
- 前記圧延金属箔は、印刷対象物の印刷領域に相当する部分以外に、印刷対象物の非印刷領域に相当する部分を有し、該非印刷領域に相当する部分には、印刷領域に相当する部分における孔の開口率よりも小さい開口率で多数の孔が開けられたものである請求項1に記載のメッシュ部材。
- 前記印刷領域に相当する圧延金属箔の部分における印刷対象物側の線部最大幅Aが30μm未満である請求項1に記載のメッシュ部材。
- メッシュ部材の厚みが5μm以上、30μm以下である請求項1に記載のメッシュ部材。
- 前記印刷領域に相当する圧延金属箔の部分と、該非印刷領域に相当する圧延金属箔の部分の境界の輪郭は、少なくとも一部が丸みを帯びたものである請求項2に記載のメッシュ部材。
- 前記印刷領域に相当する圧延金属箔の部分と、該非印刷領域に相当する圧延金属箔の部分の境界の輪郭は、少なくとも一部が丸みを帯びたものである請求項3に記載のメッシュ部材。
- 線部を構成する少なくとも片面が平坦である請求項1に記載のメッシュ部材。
- 前記圧延金属箔は、ステンレス鋼、チタン、チタン合金、ニッケル、ニッケル合金、銅、銅合金、およびアルミ合金から成る群から選択される1種からなる請求項1に記載のメッシュ部材。
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KR (2) | KR101479825B1 (ja) |
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JP5325839B2 (ja) | 2010-06-16 | 2013-10-23 | 株式会社コベルコ科研 | スクリーン印刷用メッシュ部材 |
WO2013094033A1 (ja) * | 2011-12-21 | 2013-06-27 | 三洋電機株式会社 | 太陽電池の製造方法 |
CN103192588B (zh) * | 2012-01-09 | 2016-12-14 | 昆山允升吉光电科技有限公司 | 一种金属型太阳能网板的制作新工艺 |
CN103192589B (zh) * | 2012-01-09 | 2016-12-14 | 昆山允升吉光电科技有限公司 | 双面蚀刻制作金属型太阳能网板的方法 |
JP5433051B2 (ja) | 2012-06-19 | 2014-03-05 | 株式会社コベルコ科研 | スクリーン印刷用メッシュ部材およびスクリーン印刷版 |
CN104822534B (zh) * | 2012-11-13 | 2017-03-15 | 奔马有限公司 | 印刷用悬挂金属掩膜及其制造方法 |
JP6004907B2 (ja) * | 2012-11-16 | 2016-10-12 | 日本メクトロン株式会社 | 配線基板およびタッチパネルセンサシート |
JP6081187B2 (ja) * | 2012-12-21 | 2017-02-15 | 日本メクトロン株式会社 | 配線基板、タッチパネルセンサシートおよび太陽電池用電極基板 |
KR20160043867A (ko) | 2014-10-14 | 2016-04-22 | 삼성전자주식회사 | 엑스선 검출기 및 엑스선 검출기의 제조방법 |
JP2017217874A (ja) | 2016-06-09 | 2017-12-14 | 株式会社コベルコ科研 | スクリーン印刷用メッシュ部材及びスクリーン印刷版 |
TWI616347B (zh) * | 2016-07-21 | 2018-03-01 | Printed steel plate structure for battery positive silver electrode printing | |
JP2018029145A (ja) * | 2016-08-19 | 2018-02-22 | 株式会社コベルコ科研 | スクリーン印刷版 |
TWI609236B (zh) * | 2017-01-20 | 2017-12-21 | 維銘有限公司 | 網版及其製作方法 |
TWI755486B (zh) | 2017-02-16 | 2022-02-21 | 美商康寧公司 | 具有一維調光的背光單元 |
US11186518B2 (en) * | 2017-02-16 | 2021-11-30 | Corning Incorporated | Methods of making a glass article with a structured surface |
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JP2005170055A (ja) * | 2004-12-24 | 2005-06-30 | Ngk Insulators Ltd | スクリーンマスク及びその製造方法並びに配線基板 |
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TW201200357A (en) | 2012-01-01 |
KR20140085608A (ko) | 2014-07-07 |
CN102762386A (zh) | 2012-10-31 |
JP5547672B2 (ja) | 2014-07-16 |
JP2011194885A (ja) | 2011-10-06 |
CN102762386B (zh) | 2015-05-20 |
KR20120113277A (ko) | 2012-10-12 |
TWI486261B (zh) | 2015-06-01 |
KR101479825B1 (ko) | 2015-01-06 |
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