JP5133274B2 - Mask for printing and printing apparatus provided with the same - Google Patents

Description

  The present invention relates to a printing apparatus, and in particular, by providing a printing mask with a separating member, the printing mask capable of automatically separating the mask and the printed circuit board during printing and the printing mask are provided. It is related with the printing apparatus provided with.

  The printed circuit board is a component widely used in all electronic products from home appliances to advanced communication devices. Such a printed circuit board serves to electrically connect several electronic components such as a semiconductor chip and an electric resistance chip.

  The printed circuit board includes a circuit pattern for electrically connecting a large number of electronic components to each other, and also includes a bump electrically connected to the circuit pattern. The electronic component is electrically connected to the bump and mounted on the printed circuit board. As a result, the electronic component and the circuit pattern are electrically connected to each other.

  The bumps are provided by a lithographic printing method. In the bump forming method by the flat printing method, a thin metal mask of several tens of μm is first aligned on a printed circuit board, and then a conductive solder paste is disposed on the upper surface of the metal mask. Subsequently, as the squeegee moves on the top of the metal mask by pressure, the solder paste is filled in the opening of the metal mask, so that bumps can be provided on the printed circuit board.

  After providing the bumps, the metal mask is separated from the printed circuit board. Accordingly, the bump can be easily manufactured by a flat printing method.

  However, the metal mask may adhere to the printed circuit board due to the viscous force of the solder paste. Therefore, when the metal mask is separated from the printed circuit board, the metal mask falls downward, that is, toward the printed circuit board, and the bumps provided on the printed circuit board are damaged. There is.

  The breakage of the bumps causes variations in the height of the bumps, causing a product defect, and lowering the reliability of an electric product using the bump.

  The present invention has been made in view of the above problems, and its object is to provide a separating member having an elastic restoring force so that a mask and a printed circuit board are automatically placed while printing proceeds. An object of the present invention is to provide a printing mask that can be separated and a printing apparatus including the same.

  In order to solve the above-mentioned problems and achieve the object, a printing mask according to a preferred embodiment of the present invention is arranged in a first region provided with a large number of openings and in the periphery of the first region. A mask main body having a second area provided and a part of the mask main body corresponding to the second area for automatically separating the printed circuit board from the mask in the printed area And a separating member with elastic restoring force.

  Here, the separation member may have a form protruding from a part of the lower surface of the mask body. In addition, the cross section of the separation member may have any one of an elliptical shape, a circular shape, a triangular shape, a quadrangular shape, and a polygonal shape.

  The separation member may have a stripe shape or a multi-array dot shape. The mask body may include a fixing groove into which a part of the separation member is inserted and fixed. Furthermore, an adhesive member interposed between the separation member and the mask body can be included. Furthermore, a protective member that covers the separation member may be included.

  The separation member may include a first separation member and a second separation member having a width larger than the width of the first separation member.

  The separating member may be a single rubber or at least two or more of butadiene styrene rubber, butyl rubber, nitrile rubber, chloroprene rubber, urethane rubber, silicon rubber and fluoro rubber. Can be provided by a mixed rubber mixed.

  In order to solve the above problems and achieve the object, a printing apparatus including a printing mask according to another preferred embodiment of the present invention includes a first region provided with a plurality of openings and the first region. A printed circuit board from a mask in a region where printing has been completed and a mask body provided with a second region disposed around the region, and a portion of the mask body corresponding to the second region. A printing mask including a separating member with elastic restoring force for automatic separation, a table disposed under the printing mask and mounted with a printed circuit board, and an upper portion of the printing mask being compressed and moved And a squeegee portion for printing a pattern corresponding to the opening of the printing mask on the printed circuit board.

  Further, the separation member can maintain a constant distance between the mask and the printed circuit board before and after printing, and can bring the mask and the printed circuit board into close contact with each other during printing.

  The separation member may have a stripe shape having a length parallel to a moving direction of the squeegee portion. The separation member may have a dot shape arranged in a direction parallel to a moving direction of the squeegee portion.

  Therefore, according to the printing mask and the printing apparatus of the present invention, the mask and the printed circuit board are automatically separated while the printing proceeds by providing the separating member with elastic restoring force at the lower part of the mask. Solder paste printed on the substrate can be prevented from adhering onto the mask, and the mask can be prevented from being lost when the printed circuit board is separated from the mask.

  Further, when the separating member plays a role of supporting the mask, it is not necessary to provide a separate supporting member for supporting the mask.

  Further, by preventing the mask from dropping, the collapse of the bump due to the dropping of the mask can be prevented, and a printed circuit board having a fine pitch and reliability can be manufactured.

FIG. 1 is a plan view of a printing mask according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line I-I ′ in FIG. 1. FIG. 3 is a plan view of a printing mask according to the second embodiment of the present invention. 4 is a cross-sectional view taken along the line II-II 'in FIG. FIG. 5 is a sectional view of a printing mask according to the third embodiment of the present invention. FIG. 6 is a sectional view of a printing mask according to the fourth embodiment of the present invention. FIG. 7 is a sectional view of a printing mask according to the fifth embodiment of the present invention. FIG. 8 is a cross-sectional view of a printed circuit board printing apparatus according to a sixth embodiment of the present invention. FIG. 9 is a side view of the printing apparatus according to the embodiment of the present invention. FIG. 10 is a cross-sectional view of region A of FIG. 11 is a cross-sectional view of region B in FIG. 12 is a cross-sectional view of region C in FIG. FIG. 13 is a photograph of bumps printed using a conventional printing apparatus. FIG. 14 is a photograph of bumps printed using the printing apparatus according to the embodiment of the present invention.

  Hereinafter, a printing mask and a printing apparatus including the same according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The illustrated embodiment of the present invention is provided as an example so that those skilled in the art can fully convey the idea of the present invention. Therefore, the present invention is not limited to the embodiments described below, and can be specifically expressed in other forms. In the drawings, the size and thickness of the device may be exaggerated for convenience. Throughout the specification, the same reference signs refer to the same components.

  FIG. 1 is a plan view of a printing mask according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line I-I ′ in FIG. 1. Referring to FIGS. 1 and 2, the printing mask M includes a mask body 100 including a first region 100a and a second region 100b disposed around the first region 100a, and a second region. 100b, and a separation member 104 disposed under the mask body 100.

  A plurality of first regions 100 a can be arranged on the mask body 100. Here, the first region 100a can correspond to a single printed circuit board. That is, after performing a printing operation collectively on a large number of printed circuit boards through the mask M, the large number of printed circuit boards can be individually separated to manufacture a single printed circuit board.

  The first region 100 a may include a large number of openings 101 that penetrate the mask main body 100 and a blocking part 102 that is disposed around each of the openings 101. Here, when printing is performed on the substrate using the mask M, a certain pattern can be provided on the substrate at a position corresponding to the opening 101.

  A support portion 103 extending from the blocking portion 102 is disposed in the second region 100b. The support portion 103 serves to connect a large number of first regions 100a. That is, the support portion 103 serves to support the mask body 100.

  Examples of the material of the mask main body 100 include a single metal, an alloy, and a polymer with a reinforcing material. Here, as an example of the metal, nickel may be used, and the reinforcing material may be glass fiber, polymer, or the like. However, the material of the mask main body 100 is not particularly limited by this.

  The separation member 104 is disposed on the mask main body 100 corresponding to the second region 100b, that is, the support unit 103, and automatically separates the printed circuit board from the mask M in the region where printing has been completed. For this reason, the separating member 104 is provided by a material having an elastic restoring force. Here, the separating member 104 may be any one of synthetic rubber, natural rubber, and a mixture thereof. Specific examples of the material of the separation member 104 include a butadiene styrene rubber, a butyl rubber, a nitrile rubber, a chloroprene rubber, a urethane rubber, a silicon rubber, and a fluoro rubber. A mixed rubber in which at least two of these are mixed may be used.

  Further, the separating member 104 has a form protruding from a part of the support portion 103. Accordingly, when the mask M is aligned on the substrate before the printing operation is performed, the mask main body 100 and the substrate in the first region 100a are kept at a constant interval. On the other hand, during the printing operation, the separating member 104 is pressed, the separating member 104 contracts, and the mask M and the substrate can be in close contact with each other. In addition, the press is removed in the area where the printing operation is completed, and the separating member 104 returns to the original state again by the elastic restoring force, so that the mask M and the substrate are kept at a constant interval. In other words, the mask M and the substrate are in close contact with each other during the printing because the separating member 104 is contracted, but when the printing is completed, the mask M and the substrate are immediately separated by the elastic restoring force of the separating member 104. become.

  The separating member 104 can have several shapes. For example, the cross section of the separation member 104 may have any one of an oval, a circle, a triangle, a quadrangle, and a polygon.

  Further, the separation member 104 may have a stripe shape across the mask body 100 when viewed in a plan view, or may have a dot shape in which a large number of dots are arranged.

  Further, the mask body 100 may further include a fixing groove. The separation member 104 can be inserted into the fixing groove and fixed to the mask body 100.

  The mask M may further include a mask frame 120 that supports the mask main body 100 and a fixing member 110 that fixes the mask main body 100 to the mask frame 120. Thereby, the supporting force of the mask M can be improved, and the printing operation can be performed more easily.

  Therefore, the printing mask according to the embodiment of the present invention includes the separating member, so that the mask and the printed circuit board can be automatically separated when printing is performed. Accordingly, the printed matter printed on the substrate can be prevented from adhering to the mask, and the mask can be prevented from dropping due to the adhesion of the mask when the substrate is separated from the mask. Can do.

  Further, since the separating member also serves to support the mask, a supporting member that supports the mask may not be provided separately.

  In addition, since the mask can be prevented from falling and the collapse of the bump due to the mask falling can be prevented, a printed circuit board having a fine pitch and reliability can be manufactured.

  Hereinafter, a printing mask according to the second embodiment will be described with reference to FIGS. 3 and 4. The second embodiment of the present invention has the same configuration as that of the first embodiment described above, except for the separation member. Therefore, the description which repeats with 1st Embodiment is abbreviate | omitted here, and the same referential mark is attached | subjected to the same component.

  FIG. 3 is a plan view of a printing mask according to the second embodiment of the present invention. 4 is a cross-sectional view taken along the line II-II 'in FIG.

  Referring to FIGS. 3 and 4, the printing mask M includes a mask main body 100 and a separation member 104 disposed under the mask main body 100. The mask body 100 may include a first region 100a and a second region 100b. Here, in the first region 100a, a large number of openings 101 and blocking parts 102 arranged around each opening 101 are arranged. A support portion 103 extending from the blocking portion 102 is disposed in the second region 100b.

  The separation member 104 is disposed on the mask main body 100 corresponding to the second region 100 b, that is, a partial region of the support portion 103.

  Further, the separating member 104 can have an elastic restoring force in order to automatically separate the printed circuit board from the mask M in the region where printing is finished. For example, as an example of the material for providing the separation member 104, any one of synthetic rubber, natural rubber, and a mixture thereof may be used. Specific examples of the material for providing the separation member 104 include butadiene styrene rubber, butyl rubber, nitrile rubber, chloroprene rubber, urethane rubber, silicon rubber, and fluoro rubber, a single rubber. Alternatively, a mixed rubber in which at least two of these are mixed may be used.

  A part of the mask body 100 may fall downward due to the load of the mask body 100 itself. In particular, the larger the mask M, the more likely it is that the mask body 100 will drop due to the load. Here, the central portion of the mask main body 100 receives a load larger than that of the edge, so that more drops than the edge occur. As a result, even if the separation member 104 is provided in the lower part of the mask body 100, the separation member 104 contracts due to the load of the mask body 100, and the gap between the part of the mask body 100 and the printed circuit board is already increased before printing. They can no longer be held and may stick to each other. Therefore, the elasticity of the separating member 104 is not restored by the load of the mask body 100 even after the printing is completed, and there may be a region where the mask body 100 is not separated from the printed circuit board.

  Considering this, the separating member 104 can be provided wide enough to withstand the load at the center of the mask body 100. At this time, however, the separating member 104 contracts during the printing operation in the edge region. Otherwise, there may be a region where the mask body 100 and the printed circuit board are not in close contact with each other, and the printed matter cannot be provided in a desired form in a desired region.

  In order to improve this, the separating member 104 may include a first separating member 104a and a second separating member 104b having different widths. At this time, the second separation member 104b is wider than the first separation member 104a. Here, the second separation member 104b is disposed in a region receiving a large load in the mask main body 100, that is, in the central portion. That is, the second separation member 104b can automatically separate the printed circuit board from the mask body 100 and support the mask body 100, thereby preventing the mask body 100 from falling.

  In the embodiment of the present invention, the second separation member 104b is shown as being disposed at the center of the mask body 100, but the present invention is not limited to this. For example, a large number of the second separation members 104 may be uniformly arranged on the mask main body 100.

  Therefore, in the embodiment of the present invention, the separation member 104 is arranged to have a different width for each region depending on the load received by the mask main body 100, so that the mask main body 100 falls toward the printed circuit board due to the load. In addition, the printed circuit board can be more efficiently separated from the mask M after printing.

  Moreover, even if the mask M is enlarged, the separating member 104 can prevent the mask M from falling due to a load, and a separate support member for supporting the mask M may not be provided.

  Hereinafter, a mask for printing according to the third embodiment will be described with reference to FIG. The third embodiment of the present invention has the same configuration as that of the second embodiment described above except for the protective member. Therefore, the description similar to that of the second embodiment is omitted here, and the same reference numerals are assigned to the same components.

  FIG. 5 is a sectional view of a printing mask according to the third embodiment of the present invention. Referring to FIG. 5, the mask M for printing M includes a first region 100 a provided with a large number of openings 101 and a second region 100 b disposed around the first region 100 a. And a mask body 100 corresponding to the second region 100 b, that is, a separation member 104 disposed in a partial region of the support portion 103. Here, the separation member 104 may include a first separation member 104a and a second separation member 104b having different widths. In the example shown in the figure, the second separation member 104b is wider than the first separation member 104a.

  The mask M can further include a protection member 106 that covers the separation member 104. The protective member 106 can serve to prevent the separation member 104 from being damaged by chemicals such as an organic solvent, external equipment, or the like during printing operations and during the cleaning process of the mask M. In addition, the protection member 106 can serve to fix the separation member 104 to the mask body 100.

  Therefore, the protective member 106 is preferably made of a material having excellent chemical resistance and durability. Examples of the material of the protective member 106 include Teflon (registered trademark) resin, fluorine resin, epoxy resin, silicon resin, melamine resin, ester resin, acrylic resin, and the like.

  The protective member 106 may be attached to the separating member 104 in the form of a tape. Alternatively, the protective member 106 may be in the form of a thin film provided by vapor deposition or coating.

  In the present embodiment, the separation member has been described as being inserted and fixed in a fixing groove provided in the mask main body, but is not limited thereto.

  Hereinafter, the fourth and fifth embodiments of the present invention will be described with reference to FIGS. 6 and 7 and printing masks manufactured by other methods of providing a separating member.

  The fourth and fifth embodiments of the present invention have the same configuration as that of the first embodiment described above, except for the separation member. Therefore, the description similar to that of the first embodiment is omitted here, and the same reference numerals are assigned to the same components.

  FIG. 6 is a sectional view of a printing mask according to the fourth embodiment of the present invention. Referring to FIG. 6, the printing mask M includes a mask body 100 including a first region 100a provided with a large number of openings and a second region 100b disposed around the first region 100a. , The mask body 100 corresponding to the second region 100 b, that is, the separation member 104 disposed in a partial region of the support portion 103. Here, the separating member 104 is provided through an exposure and development process after coating the mask body 100 with a rubber material.

  FIG. 7 is a sectional view of a printing mask according to the fifth embodiment of the present invention. Referring to FIG. 7, the printing mask M includes a mask body 100 including a first region 100a provided with a plurality of openings and a second region 100b disposed around the first region 100a. , The mask body 100 corresponding to the second region, that is, the separation member 104 disposed on a partial region of the support portion 103. At this time, the separating member 104 can be fixed to the mask body 100 by the adhesive member 107 provided between the mask body 100 and the separating member 104.

  As a result, in the fourth and fifth embodiments, the separation member 104 is fixed to the printing mask 100, so that the mask main body 100 does not have to be provided with a separate fixing groove, so that the mask can be manufactured more easily. Can do.

  Hereinafter, a printing apparatus provided with a printing mask according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 8 is a cross-sectional view of a printed circuit board printing apparatus according to a sixth embodiment of the present invention. Referring to FIG. 8, the printed circuit board printing apparatus is disposed under the printing mask M, the lower part of the printing mask M, the table 200 to which the printed circuit board 300 is attached, and the upper part of the mask M. A squeegee unit 400 for printing a pattern corresponding to the opening 101 of the mask M on the printed circuit board 300 may be included. Here, the mask M includes a mask main body 100 and a separating member 104.

  The mask body 100 includes a first region 100a and a second region 100b disposed around the first region 100a. In the first region 100a, a large number of openings 101 and blocking parts 102 arranged around each opening 101 are arranged. A large number of first regions 100 a are arranged in the mask main body 100. Here, the first region 100a can correspond to a single printed circuit board, and a printing operation can be performed collectively from the mask body 100 onto a large number of printed circuit boards. In the second region 100b, a support portion 103 extending from the blocking portion 102 is disposed.

  The separation member 104 is disposed on the mask body corresponding to the second region 100 b, that is, on a partial region of the support portion 103. The separating member 104 may be made of a material having an elastic restoring force in order to automatically separate the printed circuit board from the mask body 100 in a region where printing is finished.

  The separating member 104 has a stripe form having a length parallel to the moving direction of the squeegee part 400 described later, or has a form arranged in a dot shape arranged in a direction parallel to the moving direction of the squeegee part 400. be able to. Thus, printing can be performed without the mask M being inclined to one side, and the printed matter printed on the printed circuit board, that is, the uniformity of the bumps can be improved.

  When a large number of separation members 104 are provided, the separation members 104 may have different widths depending on the load applied to the mask body 100. For example, the separation member 104 disposed in the central portion of the mask body 100 may have a larger width than the separation member 104 disposed in the edge region of the mask body 100.

  In addition, the mask M may further include a mask frame 120 that supports the mask body 100 and a fixing member 110 that fixes the mask body 100 to the mask frame 120. Thereby, the supporting force of the mask M can be improved, and the printing operation can be performed more easily.

  Further, although not shown, the mask M may further include a protection member that covers the separation member 104. The mask M may further include a fixing groove for fixing the separation member 104.

  The table 200 may be disposed below the mask M. The table 200 serves to attach and fix the printed circuit board 300 during a printing operation. Although not shown, the printing apparatus can include a moving member for moving the table 200. As a result, the table 200 can move the printed circuit board 300 and align it with the mask M.

  The squeegee unit 400 compresses and moves the upper part of the mask M to provide a pattern on the printed circuit board 300. That is, the squeegee unit 400 is disposed on the mask M. The squeegee unit 140 compresses and moves the upper part of the mask M, and prints bumps on the printed circuit board 300 by filling the opening 101 of the mask M with a printing composition disposed on the mask M, for example, solder paste. be able to.

  Therefore, the printing apparatus for a printed circuit board according to the embodiment of the present invention includes a separating member at the lower part of the mask at the time of printing, so that the process of separating the mask from the printed circuit board does not have to be performed after printing. Therefore, not only does the mask fall off in the separation process, but also the process can be simplified. In addition, since the mask is not dropped, the collapse of the bump can be prevented, and a printed circuit board having a fine pitch and reliability can be manufactured.

  Hereinafter, a printing process of the printing apparatus according to the embodiment of the present invention will be described in more detail with reference to FIGS. FIG. 9 is a side view of the printing apparatus according to the embodiment of the present invention. FIG. 10 is a cross-sectional view of region A of FIG. 11 is a cross-sectional view of region B in FIG. 12 is a cross-sectional view of region C in FIG.

  9 and 10, a printed circuit board 300 is attached on a table 200 of the printing apparatus. Here, the printed circuit board 300 can take various forms such as a single-sided printed circuit board, a double-sided printed circuit board, and a multilayer printed circuit board, and is not limited in the present embodiment. Although not shown in the figure, the printed circuit board 300 includes a pad portion electrically connected to the circuit layer.

  Thereafter, the mask M including the separating member 104 is aligned on the printed circuit board 300. Here, the main body of the mask M is separated from the printed circuit board 300 by the separation member 104 at a predetermined interval.

  This will be described with reference to FIGS. After applying the solder paste 302 on the mask M, the squeegee unit 400 is compressed and moved on the mask M. Here, in the process of printing the solder paste 302, the squeegee unit 400 compresses and moves the upper part of the separating member 104 together with the mask M.

  Here, when the squeegee unit 400 is compressed and moved on the mask M, the separating member 104 is contracted by the press of the squeegee unit 400, and the mask M and the printed circuit board 300 are in contact with each other. At the same time, the solder paste 302 is filled in the opening of the mask M, and the bump 301 is provided on the pad portion of the printed circuit board 300.

  This will be described with reference to FIGS. After the squeegee unit 400 is compressed and moved, the separating member 104 is restored to its original state by the elastic force, and the mask M and the printed circuit board 300 are automatically separated.

  Here, the mask M and the printed circuit board 300 are partially separated at the same time as the bumps 301 are provided, so that the mask M is less affected by the viscous force of the solder paste 302. The mask M can be separated from the printed circuit board 300 without falling.

  In addition, since the mask M is automatically separated from the printed circuit board 300 in the printing process, factors such as the viscosity of the solder paste, the printing speed, and the printing press need not be considered. Therefore, it is possible to ensure the uniformity of the print quality and improve the productivity.

  Hereinafter, the effects of the printing mask according to the embodiment of the present invention will be described in detail with reference to the drawings. FIG. 13 is a photograph of bumps printed using a conventional printing apparatus. FIG. 14 is a photograph of bumps printed using the printing apparatus according to the embodiment of the present invention.

  As shown in FIG. 13, in the case of the conventional printing apparatus, it was recognized that the printed bumps were broken in the process of separating the printed circuit board from the mask after the printing was completed.

  On the other hand, when the printing apparatus according to the present invention shown in FIG. 14 is used, it is recognized that the printed bumps are not collapsed when the printed circuit board is automatically separated from the mask during printing. It was.

  Accordingly, in the process of separating the mask from the printed circuit board as in the prior art by providing a separating member for automatically separating from the printed circuit board during printing as in the embodiment of the present invention. As a result, no mask drop occurred, the damage to the bumps could be minimized, and the manufacturing process of the printed circuit board could be further simplified.

  Moreover, since the mask does not fall off, the collapse of the bumps can be prevented, and a printed circuit board having a fine pitch and ensuring reliability can be manufactured.

  The embodiments disclosed this time are merely examples, and should not be considered as limiting. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

DESCRIPTION OF SYMBOLS 100 Mask main body 100a 1st area | region 100b 2nd area | region 101 Opening part 102 Blocking part 103 Support part 104 Separation member 106 Protection member 110 Fixing member 120 Mask frame 200 Table 300 Printed circuit board 400 Squeegee part

Claims (14)

A mask body comprising a first region provided with a large number of openings and a second region disposed around the first region;
A plurality of separating members provided on the second region of the mask body so as to face the printed circuit board and having elastic restoring force ;
Only including,
Among the plurality of separation members, a separation member disposed at a central portion of the mask body is wider than a separation member disposed at an edge portion of the mask body. Mask for printing.   The printing mask according to claim 1, wherein the separating member is provided so as to protrude from a part of the lower surface of the mask main body.   The printing mask according to claim 1, wherein a cross section of the separating member has one of an elliptical shape, a circular shape, a triangular shape, a quadrangular shape, and a polygonal shape.   The printing mask according to claim 1, wherein the separating member has a stripe form or a multi-array dot form.   The printing mask according to claim 1, wherein the mask body includes a fixing groove into which a part of the separation member is inserted and fixed.   The printing mask according to claim 1, further comprising an adhesive member interposed between the separating member and the mask main body.   The printing mask according to claim 1, further comprising a protection member that covers the separation member.   The separating member is a butadiene styrene rubber, butyl rubber, nitrile rubber, chloroprene rubber, urethane rubber, silicon rubber or fluoro rubber, a single rubber or a mixture of at least two of these. The printing mask according to claim 1, wherein the printing mask is provided by a mixed rubber. A mask body comprising a first region provided with a number of openings and a second region disposed around the first region, and a printed circuit board on the second region of the mask body A printing mask including a plurality of separating members that are provided to oppose each other and have elastic restoring force ;
A table disposed under the printing mask and to which a printed circuit board is attached;
A squeegee unit that compresses and moves the upper part of the printing mask and prints a pattern corresponding to the opening of the printing mask on the printed circuit board;
Only including,
Among the plurality of separation members, a separation member disposed at a central portion of the mask body is wider than a separation member disposed at an edge portion of the mask body. Printing device. 2. The separation member according to claim 1, wherein a distance between the mask and the printed circuit board is kept constant before and after printing, and the mask and the printed circuit board are brought into close contact with each other during printing. The printing apparatus according to 9 . The printing apparatus according to claim 9 , wherein the separation member has a stripe shape having a length parallel to a moving direction of the squeegee unit. The printing apparatus according to claim 9 , wherein the separating member has a dot shape arranged in a direction parallel to a moving direction of the squeegee unit. The printing apparatus according to claim 9 , wherein the first area corresponds to one printed circuit board. The printing apparatus according to claim 9 , further comprising a protection member that covers the separation member.