Good Thermal Conductivity

21 Oct.,2022

 

Screen Printing Equipment

Reel to reel, semi-automatic or manual

 

Substrate

Polyester, PVC, Polycarbonate, ABS, Polymide

 

Screen Type

200 mesh stainless steel or 62T polyester screen

 

Typical Circuit Line Thickness

200 mesh stainless steel/15µm emulsion build up to achieve line thickness of 20 - 30µm
62T polyester screen / 20µm emulsion build up to achieve line thickness of 18 - 22µm

 

Typical Cure Conditions Conveyor Oven

PVC substrates 15-30 minutes, at a peak temperature 50-60°C
Polyester substrates 2-5 minutes, at a peak temperature 120-130°C

 

Lamination

This composition can be processed through standard card lamination processor. These
processes significantly reduce the achieved resistance.

 

Clean up solvent

Ethylene Glycol Diacetate

 

Dry

Dry and cure in a well ventilated oven or conveyor dryer where the exhaust meets environmental regulations.

 

General

Performance will depend to a large degree on care exercised in screen printing. Scrupulous care should be taken to keep the composition, printing screens and other
tools free of metal contamination. Dust, lint and other particulate matter may also contribute to poor yields. For additional processing and application details consult the “DuPont Smart Card Design Guide’.

 

Printing

The composition should be thoroughly mixed before use. This is best achieved by slow, gently, hand stirring with a clean burr -free spatula (flexible plastic or stainless steel) for 1-2 minutes. Care must be taken to avoid air entrapment. The screen and emulsion thickness will stronly influence the thickness and definition of the printed circuit. Typically, polyester screens (62T-77T) with 20-25um for DuPont 5029. Stainless steel screens may also be employed and will result in higher definition and thicker prints at a given mesh count. This will affect the achieved resistance. Normally only one print is needed to achieve the thickness. For very thick tracks, multiple prints may be utilized. In this case should be an intermediate drying stage. For design with very fine lines at 150m or less then the screen should be selected to give a thinner print as such line cannot be resolved consistently with thick prints. The printer conditions should be set to maximize the print thickness. This means using a high print speed and setting a low squeegee pressure. Typically this paste can be printed at speeds from 30-60 cm/s. Printing should be performed in a clean and well ventilated area.
Note: optimum printing characteristics are generally achieved in the room temperature range of 20°C-23°C. It is therefore important that the material, in its container, is at this temperature prior to commencement of printing.

 

Thinner

This composition is optimized for screen printing, thinning is not normally required. Use the DuPont recommended thinner for slight adjustments to viscosity or to replace evaporation losses. The use of too much thinner or the use of a non recommended thinner may affect the rheological behavior of the material and its printing characteristics. Refer to - Composition Properties”