JP2015196377A - Screen printing apparatus and screen printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printing apparatus and a screen printing method that can prevent printing loading failure to decrease the process cost and shorten the process time to improve productivity.SOLUTION: A screen printing apparatus 1000 of this invention comprises a kneading plate standby part 100 that makes a kneading plate 10 to knead a printing substance 30 stand by, a base plate standby part 200 that carries a base plate 20 in to stand by, a printing table 310 that sucks the kneading plate 10 or the base plate 20 and keeps a clamp arranged on a side face, a printing part 300 that has a supplier 320 remaining opposite the printing table 310 by separation above to supply the printing substance 30 onto the printing table 310 and a squeegee 330 that prints the printing substance 30, and a base plate discharging part 400 that carries in the base plate 20 finished in printing by the printing part 300 to discharge it outside.

Description

  The present invention relates to a screen printing apparatus and a screen printing method.

  A molten solder paste is applied to the printed circuit board in a predetermined pattern so that various types of small electronic components can be mounted on the printed circuit board.

  Here, the solder paste application method includes screen printing in which a solder paste pattern is directly printed by plate making, and roller coating (Roller) in which a solder paste having a relatively low viscosity is thinly applied to a roller made of rubber and coated on a circuit board. Coating) and using a solder paste with a lower viscosity than that used in the roller coating method, the solder paste is taken out through a slit to form a curtain-like film, and this is coated so that the circuit board can pass through Curtain coating to be performed, and spray coating to spray a solder paste in a spray form to form a coating film on a circuit board (Spray Coating).

  In general, a screen printer is widely used as a solder paste application method, and screen printing is performed by a solder paste application device. The screen printer presses a solder paste supplied on a metal mask having a specific pattern opening with a squeegee blade and applies the solder paste to a component mounting surface of a printed circuit board. (For example, refer to Patent Document 1).

JP 2006-167991 A

  An object of the present invention is to provide an apparatus capable of printing while maintaining a suitable viscosity of a printing material by repeatedly supplying and kneading the printing material.

  Another object of the present invention is to provide a device that shortens the process time and increases the efficiency of the printing method by allowing the material to move freely so that it can be adapted to each process situation by using a module that facilitates the movement of the material. And

  A screen printing apparatus according to the present invention includes a kneading plate standby unit that waits for a kneading plate for kneading a printing material, a substrate standby unit that loads and waits for a substrate, and the kneading plate or the substrate. A printing table on which a clamp is disposed on a side surface, a supply device that supplies a printing material on the printing table that is spaced apart and opposed to the upper side of the printing table, and a squeegee that prints the printing material And a substrate discharging unit that carries in and discharges the substrate that has been printed by the printing unit to the outside.

  The screen printing apparatus may further include a pick and place module that facilitates movement of the substrate and the kneading plate.

  The printing table can fix the substrate or the kneading plate by a vacuum suction method.

  The kneading plate may have a size larger than or equal to the size of the substrate.

  Two or more squeegees are provided, and each squeegee can operate independently.

  The squeegee is movable in the printing direction.

  The squeegee is movable in both directions.

  The squeegee can be adjusted in angle.

  The width of the clamp may be the same as or larger than the width of the printing table.

  Moreover, the clamp arrange | positioned at the side surface of the said printing table can be arrange | positioned at the one side surface or both sides | surfaces of the said printing table.

  The clamp may be formed in a printing direction of the squeegee.

  The printing material may be a solder paste, a flux, or both.

  The screen printing method according to the present invention includes a step of placing a kneading plate on a printing table having a clamp disposed on a side surface, and a supply device that is spaced apart and opposed to the upper part of the printing table. A kneading of the printing material on the kneading plate using a squeegee that is spaced apart and opposed to the top of the printing table; and the kneaded printing material is placed on the clamp. Collecting, removing the kneading plate from the printing table, and placing a substrate on the printing table.

  The method may further include supplying the printing material on a clamp disposed on a side surface of the printing table before placing the kneading plate.

  In addition, the kneading plate is placed on the printing table and removed from the printing table, and the kneading plate standby unit on which the kneading plate waits and the printing unit on which the printing material is mixed are reciprocated. Movement can be performed by a moving pick and place module.

  Moreover, the clamp arrange | positioned at the side surface of the said printing table can be arrange | positioned at the one side surface or both sides | surfaces of the said printing table.

  In addition, the method may further include printing the kneaded printing material on the substrate with the squeegee after placing the substrate.

  The printing material may be a solder paste, a flux, or both.

  The substrate may include a mask having a printing opening formed on a printing surface.

  The printing table can fix the substrate or the kneading plate by a vacuum suction method.

  The kneading plate may have a size larger than or equal to the size of the substrate.

  The width of the clamp may be the same as or larger than the width of the printing table.

  Moreover, the clamp arrange | positioned at the side surface of the said printing table can be arrange | positioned at the one side surface or both sides | surfaces of the said printing table.

  The clamp may be formed in a printing direction of the squeegee.

  The screen printing apparatus according to the present invention includes a configuration capable of maintaining the printing material at a suitable viscosity, thereby preventing printing filling defects.

  In addition, by repeatedly supplying and reusing the necessary materials for the printing material, it is possible to reduce the waste amount of the printing material, thereby reducing the process cost.

  Further, by moving the material using the pick and place module, the material can be freely moved so as to be adapted to each process situation, so that the process time can be shortened and the productivity can be improved.

It is a figure showing roughly the structure of the screen printing device by the present invention. It is a figure which shows schematically the printing part of the screen printing apparatus by this invention. It is a figure which shows schematically the pick and place module of the screen printing apparatus by this invention. 3 is a flowchart schematically showing a screen printing method according to the present invention. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly. It is a process procedure figure which shows the screen printing method by this invention roughly.

  Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings. In this specification, it should be noted that when adding reference numerals to the components of each drawing, the same components are given the same number as much as possible even if they are shown in different drawings. I must. The terms “one side”, “other side”, “first”, “second” and the like are used to distinguish one component from another component, and the component is the term It is not limited by. Hereinafter, in describing the present invention, detailed descriptions of known techniques that may obscure the subject matter of the present invention are omitted.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Screen printing device)
FIG. 1 is a diagram schematically showing the structure of a screen printing apparatus 1000 according to the present invention.

  FIG. 2 is a diagram schematically illustrating a printing unit 300 of the screen printing apparatus 1000 according to the present invention.

  FIG. 3 is a diagram schematically illustrating a pick and place module 500 of the screen printing apparatus 1000 according to the present invention.

  1 and 2, the screen printing apparatus 1000 according to the present invention includes a kneading plate standby unit 100 that waits for a kneading plate 10 for kneading the printing material 30, and a substrate 20. The board standby unit 200 that carries in and waits, the kneading plate 10 or the substrate 20 is adsorbed, and the print table 310 on which the clamp 310a is disposed on the side face and is opposed to each other at the upper part of the print table 310, and on the print table 310 A printing device 300 having a supply device 320 for supplying the printing material 30 and a squeegee 330 for printing the printing material 30, and a substrate discharging unit for loading the substrate 20 that has been printed by the printing unit 300 and discharging it to the outside 400.

  In the apparatus of the present invention, a kneading plate standby unit 100, a substrate standby unit 200, a printing unit 300, and a substrate discharge unit 400 are arranged.

  Here, the linear motion guide 600 provided so that each part can be freely reciprocated linearly is formed in the apparatus. The linear motion guide 600 is preferably formed on the upper surface of the apparatus, but may be formed anywhere as long as there is no restriction on freely moving each part in the apparatus. Not.

  The linear motion guide 600 is formed so that the pick and place module 500 in the apparatus can carry the substrate 20 or the kneading plate 10. The pick and place module 500 is linearly formed over the entire process of the kneading plate standby unit 100, the substrate standby unit 200, the printing unit 300, and the substrate discharge unit 400 so that the pick and place module 500 can linearly move in parallel.

  Here, referring to FIG. 3, the pick-and-place module 500 driven in combination with the linear motion guide 600 freely conveys plate-like materials such as the kneading plate 10 and the substrate 20 according to each process. can do.

  Thereby, it is possible to selectively arrange the conveyors that are essentially formed in the screen printing apparatus 1000, and to limit the space by making the size of the screen printing apparatus 1000 suitable for the operation of the designer. There is an advantage that you can not receive.

  The pick-and-place module 500 can move by adsorbing the kneading plate 10 or the substrate 20, can perform linear parallel movement, and can transport materials up and down.

  The kneading plate standby unit 100 is a part where the kneading plate 10 waits.

  The kneading plate 10 is mainly moved to the kneading plate standby unit 100 and the printing unit 300 by the pick and place module 500.

  The kneading plate 10 is a structure for kneading the printing material 30 and may have a size that is the same as or larger than the size of the substrate 20.

  When the kneading plate 10 moves to the printing unit 300, the printing material 30 is fixed to the printing table 310, and the printing material 30 can be kneaded by temporarily printing the printing material 30 on the kneading plate 10 with the squeegee 330.

  The substrate standby unit 200 is a part in which the printed substrate 20 is carried in from the outside and stands by.

  The substrate 20 is printed by the printing unit 300 after waiting by the substrate standby unit 200.

  The substrate 20 that has been printed is carried from the printing unit 300 to the substrate discharge unit 400 and waits for discharge, and then moved to a thermal process line for reflowing the printed substance.

  At this time, the substrate 20 can freely move through the substrate standby unit 200, the printing unit 300, and the substrate discharge unit 400, and this can be moved by the pick and place module 500.

  Here, the substrate 20 is a circuit substrate in which one or more layers of circuits including connection pads are formed in an insulating layer, and may preferably be a printed circuit board.

  As the insulating layer, a resin insulating layer may be used. As the resin insulating layer, a thermosetting resin such as an epoxy resin, a thermoplastic resin such as polyimide, or a resin impregnated with a reinforcing material such as glass fiber or an inorganic filler, for example, a prepreg may be used. In addition, a thermosetting resin and / or a photocurable resin may be used, and the present invention is not particularly limited thereto.

  The circuit including the connection pads can be applied without limitation as long as it is used as a conductive metal for circuits in the circuit board field, and copper is generally used in a printed circuit board.

  The printing unit 300 includes a printing table 310 on which clamps 310 a are disposed on the side surfaces, a supply device 320 coupled to a driving shaft 340 that is spaced apart and opposed to the upper portion of the printing table 310, and a squeegee 330.

  The printing table 310 can fix the substrate 20 or the kneading plate 10 by a vacuum suction method. In addition, a clamp 310a can be disposed on the side surface of the printing table 310, and can be formed on one side surface or both side surfaces.

  The clamp 310a is formed on the side surface of the printing table 310, and can be formed in the printing direction of the squeegee 330 described later.

  Further, the width and height of the clamp 310a can be formed to be the same as or larger than the width and height of the print table 310, and the width of the print table 310 is not so different, and printing of the squeegee 330 is facilitated.

  A supply device 320 and a squeegee 330 are coupled to a drive shaft 340 that is spaced apart and opposed to the upper portion of the printing table 310.

  At this time, the supply device 320 is a device that supplies the printing material 30 and can reciprocate linearly and supply the printing material 30 to a desired portion. In the present invention, the drawing in which the printing material 30 is supplied onto the clamp 310a arranged on the side surface of the printing table 310 is presented, but the position where the printing material 30 is supplied is not limited thereto.

  At this time, the printing material 30 supplied from the supply device 320 may be a flux and / or a solder paste, and a material compatible with the printing material 30 is supplied to maintain a viscosity that facilitates printing.

  Further, in order to uniformly knead the printing material 30 replenished by the supply device 320, the kneading plate 10 waiting in the kneading plate standby unit 100 is placed on the printing table 310 of the printing unit 300 and Kneading can be performed by a driving method in which the squeegee 330 temporarily prints on the ding plate 10.

  Printing may be performed about 3 to 5 times so that the printing material 30 whose viscosity has changed after being printed on the substrate 20 and the newly replenished printing material 30 are uniformly mixed. The printing material 30 uniformly mixed with each other is collected in a clamp of the printing table 310 and used for a printing operation on the substrate 20.

  The operator can set the apparatus to automatically replenish the printing substance 30 of the supply apparatus 320, and a power line communication program (Power Line Communication Program) is set to set the automatic replenishment of the printing substance 30 to a predetermined number of times. Can be used.

  In addition, the squeegee 330 is configured in the apparatus for printing the printing material 30 and can be provided in two or more, and each squeegee 330 can operate independently.

  At this time, the squeegee 330 can reciprocate in the printing direction.

  The material of the squeegee 330 may be different or the same, and the squeegee 330 can be made to facilitate angle adjustment.

  The substrate discharge unit 400 is a place where the substrate 20 that has been printed by the printing unit 300 is carried in. The substrate 20 can be transported from the printing unit 300 to the substrate discharge unit 400 by the pick and place module 500.

  This is a portion that waits after the printed substrate 20 is carried in and is discharged to the next process.

  The screen printing apparatus 1000 includes a supply device 320 for maintaining a suitable viscosity of the printing material 30 and the kneading plate 10, and can prevent printing filling defects.

  Further, by repeatedly supplying necessary materials to the printing material 30 and reusing them, the amount of printing material 30 discarded can be reduced, thereby reducing the process cost.

  In addition, by moving the material using the pick and place module 500, the material can be freely moved so as to be adapted to each process status, thereby shortening the process time and improving the productivity. .

(Screen printing method)
FIG. 4 is a flowchart schematically showing a screen printing method according to the present invention.

  5 to 13 are process procedure diagrams schematically showing the screen printing method according to the present invention.

  In the screen printing method according to the present invention, the kneading plate 10 is placed on the printing table 310 having the clamps 310a disposed on the side surfaces, and the supply device 320 that is spaced apart and opposed to the upper part of the printing table 310 is disposed on the clamps 310a. Supplying the printing material 30 to the upper portion of the printing table 310, kneading the printing material 30 on the kneading plate 10 using a squeegee 330 that is spaced apart and opposed to the upper portion of the printing table 310, and the kneaded printing material 30 Collecting on the clamp 310a, removing the kneading plate 10 from the printing table 310, and placing the substrate 20 on the printing table 310.

  First, referring to the flowchart of FIG. 4, in the flow from the start stage to printing, the printed substrate 20 is carried in from the outside, waits at the substrate standby unit 200, is transported to the pick and place module 500, and is transferred to the printing unit 300. Placed on the print table 310.

  The printed substrate 20 can be automatically replenished with flux and / or solder paste via the supply device 320 for each number of sheets.

  The number of sheets may be 20, 30, or 40, and such a numerical value is not limited in the present invention.

  Next, the kneading plate 10 waiting in the kneading plate standby unit 100 is transported by the pick and place module 500 and placed on the printing table 310 of the printing unit 300.

  The printing material 30 whose viscosity has changed after printing the substrate 20 on the kneading plate 10 which is vacuum-sucked and fixed to the printing table 310 and the supplemented printing material 30 are temporarily printed by the squeegee 330 and mixed. Smelt.

  In this way, the kneading plate 10 is put into the printing unit 300 so as to maintain the printing material 30 whose viscosity has changed after the substrate 20 is printed, and after the printing material 30 is kneaded, the printing material kneaded in this way. The repeated flow of printing 30 on the substrate 20 can also be confirmed with reference to the flowchart.

  At this time, a process that is the last stage of the flowchart and is repeated before the printing stage of the substrate 20 will be described in order with reference to FIGS. 5 to 13 (FIG. 1).

  FIG. 5 is a diagram schematically illustrating the printing unit 300. The printing unit 300 is coupled to a printing table 310 in which a clamp 310a is disposed on a side surface and a drive shaft 340 that is spaced apart and opposed to the top of the printing table 310. Supply device 320 and squeegee 330.

  The printing table 310 can fix the substrate 20 or the kneading plate 10 by a vacuum suction method. In addition, a clamp 310a can be disposed on the side surface of the printing table 310, and can be formed on one side surface or both side surfaces.

  The clamp 310a is formed on the side surface of the printing table 310, and can be formed in the printing direction of the squeegee 330 described later.

  Further, the width and height of the clamp 310a can be formed to be the same as or larger than the width and height of the print table 310, and the width of the print table 310 is not so different, and printing of the squeegee 330 is facilitated.

  A supply device 320 and a squeegee 330 are coupled to a drive shaft 340 that is spaced apart and opposed to the upper portion of the printing table 310.

  At this time, the supply device 320 is a device that supplies the printing material 30 and can reciprocate linearly and supply the printing material 30 to a desired portion. In the present invention, the drawing in which the printing material 30 is supplied onto the clamp 310a arranged on the side surface of the printing table 310 is presented, but the position where the printing material 30 is supplied is not limited thereto.

  At this time, the printing material 30 supplied from the supply device 320 may be a flux and / or a solder paste, and a material compatible with the printing material 30 is supplied to maintain a viscosity that facilitates printing.

  Further, in order to uniformly knead the printing material 30 replenished by the supply device 320, the kneading plate 10 waiting in the kneading plate standby unit 100 is placed on the printing table 310 of the printing unit 300 and Kneading can be performed by a driving method in which the squeegee 330 temporarily prints on the ding plate 10.

  Printing may be performed about 3 to 5 times so that the printing material 30 whose viscosity has changed after being printed on the substrate 20 and the newly replenished printing material 30 are uniformly mixed. The printing material 30 uniformly mixed with each other is collected in a clamp of the printing table 310 and used for a printing operation on the substrate 20.

  The operator can set the apparatus to automatically replenish the printing substance 30 of the supply apparatus 320, and a power line communication program (Power Line Communication Program) is set to set the automatic replenishment of the printing substance 30 to a predetermined number of times. Can be used.

  Further, the squeegee 330 is configured to print the printing material 30, and two or more squeegees 330 can be provided, and each squeegee 330 can operate independently.

  At this time, the squeegee 330 can reciprocate in the printing direction.

  The material of the squeegee 330 may be different or the same, and the squeegee 330 can be formed to facilitate angle adjustment.

  This figure shows a state before the kneading plate 10 is inserted. The kneading plate 10 is sucked by the kneading plate standby unit 100 and moved to the printing unit 300 by the pick and place module 500.

  Referring to FIG. 6, the kneading plate 10 is placed on the printing table 310 of the printing unit 300 from the kneading plate standby unit 100 by the pick and place module 500.

  The kneading plate 10 is fixed to the printing table 310 by a vacuum suction method, and the printing material 30 whose viscosity has been changed by the continuous printing of the substrate 20 is waiting on the clamp 310a.

  At this time, the printing material 30 may be a pre-stage of the kneading process described later, and may be difficult because the viscosity of the printing material 30 is high and the printing material 30 is difficult to roll, or may be thin and low in viscosity.

  The size of the kneading plate 10 placed on the printing table 310 may be larger than or the same as the size of the substrate 20 to be printed.

  Referring to FIG. 7, the printing material 30 is supplemented with another printing material 30. In this case, the supplemented printing material 30 may be flux and / or solder paste.

  It can be selected and replenished as a printing material 30 to maintain a viscosity suitable for printing.

  If the viscosity of the printing material 30 is too high, the printing material 30 may not be rolled and printing filling failure may occur, and if the viscosity is low and thin, the elongation problem and the printing result will vary. It is important to print while maintaining a suitable viscosity.

  Referring to FIG. 8, the printing material 30 gathered on the clamp 310a before the kneading plate 10 is placed on the printing table 310 and the printing material 30 replenished by the supply device 320 of FIG. 7 are kneaded. The

  Here, the printing material 30 before the kneading plate 10 is placed may be a solder paste, and the printing material 30 replenished by the supply device 320 may be a flux.

  However, in the present invention, the printing material 30 is not limited to any one, and may be flux, solder paste, or both.

  The squeegee 330 temporarily prints the printing material 30 while reciprocating in the printing direction on the kneading plate 10 covered with the printing material 30.

  By temporarily printing the squeegee 330 by sliding it in the printing direction, the printing substance 30 can be mixed uniformly.

  Referring to FIGS. 9 to 11, after the printing material 30 is kneaded on the kneading plate 10 to a viscosity suitable for printing, the printing material 30 is collected by the squeegee 330 and transferred to the clamp 310a.

  Next, using the pick and place module 500, the kneading plate 10 placed on the printing table 310 is lifted and moved to the kneading plate standby unit 100.

  Referring to FIG. 12, the substrate to be printed 20 existing in the substrate standby unit 200 is transported to the print table 310 using the pick and place module 500.

  The printing table 310 can fix the substrate 20 by a vacuum suction method.

  The board 20 is a circuit board in which one or more circuits including connection pads are formed in an insulating layer, and may preferably be a printed circuit board.

  As the insulating layer, a resin insulating layer may be used. As the resin insulating layer, a thermosetting resin such as an epoxy resin, a thermoplastic resin such as polyimide, or a resin impregnated with a reinforcing material such as glass fiber or an inorganic filler, for example, a prepreg may be used. In addition, a thermosetting resin and / or a photocurable resin may be used, and the present invention is not particularly limited thereto.

  The circuit including the connection pads can be applied without limitation as long as it is used as a conductive metal for circuits in the circuit board field, and copper is generally used in a printed circuit board.

  The substrate 20 may include a mask having a printing opening formed on the printing surface.

  At this time, if the mask is a resist pattern, the step of forming the mask is the step of laminating the resist on the substrate 20 and the bump forming holes corresponding to the bump forming openings are formed in the resist to expose the connection pads. Performing a process.

  Here, the hole for bump formation can be formed by a photolithography method including exposure and development, and the resist may be a lie film (Dry-Film; DF).

  Referring to FIG. 13, the printing material 30 kneaded with a viscosity suitable for printing and collected on the clamp 310 a is transported to the substrate 20 and printed by the squeegee 330.

  Two or more squeegees 330 are provided in the apparatus for printing the printing material 30, and each squeegee 330 can operate independently.

  At this time, the squeegee 330 can reciprocate in the printing direction.

  The material of the squeegee 330 may be different or the same, and the squeegee 330 can be made to facilitate angle adjustment.

  Such a screen printing method has an effect of preventing the occurrence of defective printing filling by replenishing the printing material 30 in order to use the printing material 30 while maintaining a suitable viscosity, and using the printing material 30 by uniformly kneading. is there.

  Further, by repeatedly supplying necessary materials to the printing material 30 and reusing it, it is possible to reduce the waste amount of the printing material 30, thereby reducing the process cost.

  In addition, by moving the material using the pick and place module 500, the kneading plate 10 or the substrate 20 can be freely moved so as to be adapted to each process situation, thereby reducing the process time and improving the productivity. Can be improved.

  As described above, the present invention has been described in detail based on the specific embodiments. However, the present invention is only for explaining the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that modifications and improvements within the technical idea of the present invention are possible.

  All simple variations and modifications of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be apparent from the appended claims.

  The present invention is applicable to a screen printing apparatus and a screen printing method.

DESCRIPTION OF SYMBOLS 10 Kneading plate 20 Substrate 30 Printing substance 100 Kneading plate standby part 200 Substrate standby part 300 Printing part 310 Printing table 310a Clamp 320 Supply device 330 Squeegee 340 Drive shaft 400 Substrate discharge part 500 Pick and place module 600 Linear motion guide (LM) guide)
1000 screen printer

Claims (24)

A kneading plate standby unit for waiting a kneading plate for kneading the printing material;
A board standby section for loading and waiting for a board;
A printing table that adsorbs the kneading plate or the substrate and has a clamp disposed on a side surface thereof, a supply device that supplies a printing material on the printing table that is spaced apart and opposed to the upper portion of the printing table, and the printing material. A printing unit having a squeegee to print;
A screen printing apparatus, comprising: a substrate discharging unit that carries in and discharges the substrate that has been printed by the printing unit to the outside.   The screen printing apparatus of claim 1, further comprising a pick and place module that facilitates movement of the substrate and the kneading plate.   The screen printing apparatus according to claim 1, wherein the printing table fixes a substrate or a kneading plate by a vacuum suction method.   The screen printing apparatus according to claim 1, wherein a size of the kneading plate is larger than or equal to a size of the substrate.   The screen printing apparatus according to claim 1, wherein two or more squeegees are provided, and each squeegee operates independently.   The screen printing apparatus according to claim 1, wherein the squeegee is movable in a printing direction.   The screen printing apparatus according to claim 1, wherein the squeegee is movable in both directions.   The screen printing apparatus according to claim 1, wherein the squeegee is adjustable in angle.   The screen printing apparatus according to claim 1, wherein a width of the clamp is equal to or larger than a width of the printing table.   The screen printing apparatus according to claim 1, wherein clamps arranged on a side surface of the printing table can be arranged on one side surface or both side surfaces of the printing table.   The screen printing apparatus according to claim 1, wherein the clamp is formed in a printing direction of the squeegee.   The screen printing apparatus according to claim 1, wherein the printing substance is a solder paste, a flux, or both. Placing a kneading plate on a printing table with clamps on the sides;
A feeding device spaced apart and opposed at the top of the printing table feeds the printing material onto the clamp;
Kneading the printing material on the kneading plate using a squeegee that is spaced apart and opposed at the top of the printing table;
Collecting the kneaded printed material on the clamp;
Removing the kneading plate from the printing table;
Placing a substrate on the printing table.   14. The screen printing method according to claim 13, further comprising supplying the printing material onto a clamp disposed on a side surface of the printing table before placing the kneading plate.   In the step of placing the kneading plate on the printing table and the step of removing it from the printing table, the kneading plate standby unit on which the kneading plate stands by and the printing unit for kneading the printing material are reciprocated. The screen printing method according to claim 13, wherein the movement is performed by a pick and place module.   The screen printing method according to claim 13, wherein clamps disposed on a side surface of the printing table can be disposed on one side surface or both side surfaces of the printing table.   14. The screen printing method according to claim 13, further comprising the step of printing the kneaded printing material on the substrate with the squeegee after the step of placing the substrate.   The screen printing method according to claim 13, wherein the printing substance is a solder paste, a flux, or both.   The screen printing method according to claim 13, wherein the substrate further includes a mask having a printing opening formed on a printing surface.   The screen printing method according to claim 13, wherein the printing table fixes a substrate or a kneading plate by a vacuum suction method.   The screen printing method according to claim 13, wherein a size of the kneading plate is larger than or equal to a size of the substrate.   The screen printing method according to claim 13, wherein a width of the clamp is equal to or larger than a width of the printing table.   The screen printing method according to claim 13, wherein clamps disposed on a side surface of the printing table can be disposed on one side surface or both side surfaces of the printing table.   The screen printing method according to claim 13, wherein the clamp is formed in a printing direction of the squeegee.

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