Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Thick Film Screen Printer

Views: 8440

#76121

Thick Film Screen Printer | 8 August, 2016

Can we use SMD Machines for printing inks on flexible PCB? (There is a FPC with four layer printed ink) I attached a picture of my board.

Attachments:

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#76125

Thick Film Screen Printer | 8 August, 2016

The short answer is yes, but you will be screen not stencil printing. Your printer may have print modes to support print/flood and flood/print modes. You should contact your printer manufacturer and a screen manufacturer to discuss this application.

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#76143

Thick Film Screen Printer | 12 August, 2016

Thank you for response. But I don't know the difference between stencil and screen printer. I also don't know what is flood print mode. Can you kindly explain what are these?

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#76156

Thick Film Screen Printer | 13 August, 2016

A Screen printer is similar to a stencil printer,except the screen isn't made from a piece of brass, copper, plastic or stainless steel, with laser cut holes. The screen has a stainless steel , silk or polyester mesh, which is then dipped in a photosensitive fluid baked on and then developed in a photographic process. It is used a lot in the textile industries.

regards sarason

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#76157

Thick Film Screen Printer | 14 August, 2016

Thanks for your response. You said that "It is used a lot in the textile industries". Is thick film printing process is screen printing, like printing in textile industry?

There is another question yet. What is print/flood and flood/print mode?

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#76160

Thick Film Screen Printer | 15 August, 2016

The screens are basically the same technology. But when I worked with them , the screens were 6 inches square for a 3 or 4 inch hybrid. It is used on a precision printing machine to get good alignmant. Tee- shirts use a bigger stencil and are not so critical on alignment. The same technique on an even large scale is used for 3 and 4 metre wide continuous cloth printing.

regards sarason

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#76161

Thick Film Screen Printer | 15 August, 2016

In screen printing the material is transferred through openings in the screen mesh. You can imagine small columns of "ink" that coalesce after the screen releases. Screen printing is also an off-contact process verse contact process of stencils. The small gap between the board and screen allows the screen to be deflected to the board by the squeegee than "snap-off" after the squeegee moves past. The motion releases the material from the mesh opening. Flood/print is a screen printing mode where the mesh openings are flooded (filled with material via a squeegee stroke)before the print stroke. Print/flood is the opposite mode. It is often used for material that quickly dry in the mesh openings.

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#76328

Thick Film Screen Printer | 10 September, 2016

Semiconsoft is a premier source of thin-film thickness measurement instruments. Visit here for more thickness measurement instrument: http://www.semiconsoft.com/wp/products/

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#76379

Thick Film Screen Printer | 21 September, 2016

Hi Hamed, We manufacture Thick Film Screens and offer free technical assistance. Please let me know if I can assist you. Carlos Dugay (760) 798-6984

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