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AssigneeNGK Insulators, Ltd.
InventorsMakoto Ohmori, Yukio Aisaka, Ayumi Ida, Tsutomu Nanataki
Estimating the term…
A method for producing a screen print having a given print pattern formed on a printing material by sliding a squeegee over a screen of a screen printing plate that includes the screen being disposed above the printing material in the form of a printing plate frame while keeping a given clearance therebetween. As such, the ratio (LP/LF) of a length (LP) of a side of the printing pattern perpendicular to the axis of the sliding direction of the squeegee to an internal size (LF) of a side of the printing plate frame perpendicular to the axis of the sliding direction of the squeegee is 0.45 or more, and an optimum clearance between the printing material and the screen printing plate is then selected and set on the basis of the correlation between the clearance and the degree of deviation in printing position of the print pattern.
A method for producing a screen print having a given print pattern formed thereon by sliding a squeegee in a given direction over a screen of a screen printing plate comprising the screen having a mask material with openings and a printing plate frame on which the screen is stretched, said screen being disposed above a printing material in the form of a flat plate in parallel with the printing material with keeping a given clearance therebetween,
Dependencies are inferred from the claim text.
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Inking and printing with a printer's forme: stencil printing; Silk-screen printing
By screen printing or stencil printing: methods or means for supplying the conductive material and for forcing it through the screen or stencil
Use of materials for the substrate: inorganic insulating substrates, e.g. ceramic, glass
Inspection; Monitoring; Aligning: monitoring a manufacturing process
About 2 years of term left · ends 23 Oct 2028 (estimated)
The present invention relates to a method for producing a screen print that is excellent in printing precision.
Screen printing which forms a print film comprising ink, paste or the like on the surface of a material to be printed using a printing plate for screen printing (hereinafter sometimes referred to as merely “screen printing plate” or “printing plate”) can form fine patterns and has high mass-productivity, and hence is utilized in a wide variety of industrial fields. In general, screen printing is a method which uses a screen mask constructed by stretching onto a printing plate frame a mesh having openings closed with a resin (such as photosensitive emulsion film), an ink material is then placed on the upper face of the screen mask and a squeegee is slid, thereby squeezing out the ink material to the under side of the screen mask (substrate side) through the given openings formed in the screen mask to perform the printing.
According to this screen printing method, since the screen mask is flexible and besides the printing pressure is low, it is possible to carry out the printing on various printing materials, such as papers, fabrics, plastics, glasses, metals, and ceramics. Furthermore, since patterns formed by ink materials can be made thick, the screen printing can also be applied to production of electronic parts such as thick film IC (hybrid IC), printed-wiring boards, resistors and capacitors. The screen mask is produced by patterning a photosensitive emulsion film coated on a mesh by photolithographic technology. It is also produced by forming mesh patterns by selectively etching a metallic film by photolithographic technology.
FIG. 1 is a side view of one example of a printing machine used in the method for producing a screen print according to the present invention.
FIG. 2 is a top view of one example of screen printing plates used in the method for producing a screen print according to the present invention.
FIG. 3 is an oblique view showing the state of the screen printing plate being disposed on a printing plate frame holder.
1: opening, 2: mask material, 3: screen, 4: printing plate frame, 5: screen printing plate, 6: air cylinder, 10: printing material, 11: printing plate frame holder, 12: printing stage, 30: print pattern, A-H: measuring points, CL: clearance, LF: internal size of printing plate frame, LP: length of one side of print pattern
The preferred embodiments of the present invention will be explained below. It will be understood that the present invention is not limited to the embodiments, and various changes and improvements may be made based on the common knowledge of those skilled in the art within the principle and scope of the invention.
FIG. 1 is a side view showing one example of a screen printing plate used in the method for producing a screen print according to the present invention, and FIG. 3 is an oblique view showing the state of the screen printing plate being disposed on a printing plate frame holder. As shown in FIG. 1 and FIG. 3, in one embodiment of the method for producing a screen print according to the present invention, first, the screen printing plate 5 is placed on the printing plate frame holder 11. The screen printing plate 5 comprises a filmy screen 3 and a printing plate frame 4 on which the screen 3 is stretched. Numeral 6 in FIG. 1 shows an air cylinder which fixes the screen printing plate on the printing plate frame holder 11.