Inkjets

Fig. 11-19. The drop ejection process in an inkjet printer (a) bubble nucleation (b) bubble growth and drop ejection (c) refill. [From J. H. Bohoiquez, B. P. Canfield, K. J. Courian, F. Drogo, C. A. E. Hall, C. L. Holstun, A. R. Scandalis, and M. E. Shepard, Hewlett-Packard J. 45(1), 9-17 (Feb. 1994). Copyright 1994, Hewlett-Packard Company. Reproduced with permission.]...

Capillary pressure gradients and Marongoni flow induce flow in porous media comprising glass beads or sand particles [40-42], Wetting and spreading processes are an important consideration in the development of inkjet inks and paper or transparency media [43] see the article by Marmur [44] for analysis of capillary penetration in this context. 

FIG. 21-49 Application of a noncontact inkjet printing system used for coding plastic bottles and corrugated fiberboard cartons. (VIDEOJET shown, couitesy of VIDEOJET Systems International, Inc., 1500 Mittal Blvd., Wood Dale, IL 60191-1073.)... 

Inkjet printers are suitable in low-volume settings such as personal offices and the home. Inkjets provide low-cost color capability. Power use while the printer is idle is generally low, so that a distinct low-power mode is not needed. 

This process uses a moving laser beam, directed by a computer, to prepare the model. The model is made up of layers having thicknesses about 0.005-0.020 in. (0.012-0.50 mm) that are polymerized into a solid product. Advanced techniques also provides fast manufacturing of precision molds (152). An example is the MIT three-dimensional printing (3DP) in which a 3-D metal mold (die, etc.) is created layer by layer using powdered metal (300- or 400-series stainless steel, tool steel, bronze, nickel alloys, titanium, etc.). Each layer is inkjet-printed with a plastic binder. The print head generates and deposits micron-sized droplets of a proprietary water-based plastic that binds the powder together. 

Hughes TR et al. Expression profiling using microarrays fabricated by an inkjet oligonucleotide synthesiser. Nature Biotechnol 2001 19 342-347. 

Ink jet printing is now the dominant non-impact printing technology. It has achieved this position from a platform of low cost, full color, very good (and ever improving) quality, and reasonable speed. For example, good quality color inkjet printers currently retail for ca. US 70, whereas the cheapest color laser printer costs ca. US 1,400 at the time of writing 43... 

Divalent metal cations such as Ca2+ are used in some inkjet media, such as coated paper and glossy photorealistic media, to fix the water-soluble dye and make it waterfast by forming an insoluble salt. However, cationic organic compounds are currently the preferred choice for this function. 

The Chemical Inkjet Printer (ChIP), an inkjet printer-like device which is equipped with a piezoelectric reagent-dispensing system, has been developed by Shimadzu Corporation. The ChIP can dispense picoliter volumes of matrix solution onto a tissue section, which has four printing heads and nozzles that have no contact with the tissue section surface. 

Shimma S, Furuta M, Ichimura K. Direct MS/MS analysis in mammalian tissue sections using MALDI-QIT-TOFMS and chemical inkjet technology. Surf. Interface Anal. 2006 38 1712-1714. 

Shimma S, Furuta M, Ichimura K. A novel approach to in situ proteome analysis using a chemical inkjet printing technology and MALDI-QIT-TOF tandem mass spectrometer. J. Mass. Spectrom. Soc. Jpn. 2006 54 133-140. 

Sakurai K, Teramura Y, Iwata H (2011) Cells immobilized on patterns printed in DNA by an inkjet printer. Biomaterials 32 3596-3602... 

Fabrication by inkjet/piezoelectric methods (indirect-deposition approach)... 

DNA arrays are fabricated by immobilizing the complementary DNA (cDNA) onto a solid substrate such as silicon, nylon or glass. This can be achieved by robotic printing of polymerase chain reaction (PCR) products (also known as direct-deposition approach), photolithographical synthesis of complementary oligonucleotides or piezoelectric inkjet printing of PCR products (also known as indirect-deposition approach). 

Inkjet printing In between robotic printing and photolithography In between robotic printing and photolithography 5-75-mers Equipments need strict maintenance and experiment must be performed in a clean and uncontaminated environment... 

In his work, Wallace [12] formed inkjet printheads from the rectangular blocks made of piezoelectric material. A diamond saw is used to create fluid channel grooves and channel actuator structures. These grooves are approximately 1 pm apart, 360 pm deep and 170 pm wide. Next, a cover plate is attached to the top of the grooves to form an enclosed rectangle channel for the working fluids. A polymer orifice plate (see Fig. 11.3) with many 40 pm diameter orifices is attached to the other end of the grooves. 

Any forms of contamination at the orifice will lead to the misdirection of the droplets hence, the inkjet printing method requires that the orifice be free of contaminations. Damages at the orifice must be repaired in order to prevent the altering of the size of the... 

FABRICATION OF TFT USING INKJET-PRINTED SILICON FILM... 

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