Screen printing print resolution

Shapee, S.M., Alias, R., Yusoff, M.Z.M., Ibrahim, A., Ambak, Z., Saad, M.R. (2010). Screen Printing Resolution of Different Paste Rheology for Printed Multilayer LTCC Tape. Proceedings of International Conference on Electronic Packaging 2010 (ICEP2010), Hokkaido, Japan, May 2010, p>p. 255-258. 

Other small molecule species decompose and volatilise. The glass frit fuses, wetting the surface of the functional phase, providing adhesion and sealing of the composite to the substrate. Because of the screen printing process, resolution is modest. Fired film thicknesses, which range from 10 to 50 p.m (0.4 to 2.0 mils), are large compared to thin-fHm microelectronics. Some photosensitive pastes are also ia use. 

Screen-printed carbon electrodes were also evaluated in the Topas microchip for separation and detection of pAP and AsA. The theoretical plate number (AO, half-peak width (wy2), peak current and resolution are also shown in Table 34.2. Peak current at SPEs was higher than those obtained with gold and platinum wires. 

Screen Printing Established technology and major ink for printed electronics today. Inexpensive capital equipment. Low price inks. Can be expensive due to amount of material required relative to yields. Mainly in RFID antennas and PV front electrodes. Feature resolution 75 microns. 

Large-area displays like LCDs or TFTs usually are fabricated by screen printing or lithographic techniques. However, with increasing display resolution at reduced fabrication costs, non-contact droplet deposition of the colors could be a promising alternative. 

Screen printing allows relatively thick films to be patterned, but lacks the lateral resolution of the other techniques presented. It seems likely that low-resolution OLED [24] and electrochromic matrix displays will be produced with this technique. It may also be used to apply protective (passivation) films to seal devices in order to prevent oxygen and water from reaching the sensitive electroactive films (see Section 4.6). 

Even though it is not capable of the resolution that offset and flexo can produce, screen printing is a relatively easy method to implement and highly flexible as far as ink is concerned, making it an obvious first choice for low-resolution applications. 

Figure 4.13 illustrates several techniques for patterning PEDOT PSS via electrochemical overoxidation. Conversion of a simple plotter pen or a screen-printing station are relatively straightforward, the latter allowing print resolution of a few hundred micrometers. To demonstrate that the technique is limited only by the resolution of the printing method, 2 p,m lines (the smallest mask available) were patterned in a 200 nm thick film with the aid of a photoresist mask [29]. 

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