Photosensitive printing process

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. 

What is the step in the EP print process that uses a laser to discharge selected areas of the photosensitive drum, thus forming an image on the drum ... 

Silk continued to be one of the most common materials used until the development of synthetic materials, and the term "silk screening" is still commonly used to describe the screen-printing process. The development of S5mthetic fibers, such as nylon, made possible greater control of the mesh materials, and the added development of photosensitive materials used for creating the patterns allowed screen printing to become much more precise, repeatable, and controllable [8]. 

Photoresists are divided into two classes. Negative resists are materials whose solubilities are decreased by exposure to actinic radiation. The image is then developed by selectively dissolving the more-soluble, unexposed portion of the film. This basic process was invented 150 years ago and it is used in the manufacture of printing plates (63). Positive resists, on the other hand, are materials whose solubilities are increased by exposure, so that in development the exposed portion of the film is removed. The history of photoresists is described in Kosar s book (63), which is also an excellent review of the history of many photosensitive materials. 

Figure 7.15 summarizes all the EP process printing steps. First, the printer uses a rubber scraper to clean the photosensitive drum. Then the printer places a uniform, negative, -600Vdc charge on the photosensitive drum by means of a... 

In newspaper printing, photosensitive resins are used frequently during the platemaking process. The process is very simple. It relies on the photopolymerization of a soluble monomer or oligomer resulting in the formation of an insoluble polymer film. Aromatic carbonyl... 

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