Lithographic small bathroom vanities processes PCB manufacture: short historical excursus and techn

Forum Quick Links View new posts in electronics forum Microcontrollers and Other Logic Computer Forum Quick Links FAQ Calendar users Member List Forum Actions Mark Forums Read Quick Links View Forum Leaders small bathroom vanities What's New? ELFA shop
Forum Tutorials small bathroom vanities electronics forum PCB manufacturing methods overview If this is your first visit, be sure Frequently Asked Questions (FAQ) clicking the link above. You have to register before you can post: click the register link above to proceed.
Lithographic small bathroom vanities processes PCB manufacture: short historical excursus and technological younger generation about remembering. Motto: If everything new is well forgotten old only then blame the poor historical memory. 1) 50-90 years: Kitchen Technology - Draw freehand first plate, plan a course. Planning is used for millimeter paper, the holes marked small bathroom vanities with a pen and slots with a pencil. Using an eraser and colored pencils, progressively recover better track shape, and location of the trace. Irreparable mistake spot sealed with graph paper patch. Later appears folding type (harmonic) ESM large printer paper, small bathroom vanities and the box is 2.5mm, which is much more convenient tablet stands logic, as well as štekeru the standards. The method itself, deleted and glue. When the plate-planned, it is transferred to clad foliēto (then getinaksu) with a typewriter copying paper (carbon paper) into the track the contour of the power of the court, and more specifically to meet when planning paper with insulating tape stuck to the plate and immediately drills into the holes. Then atlīmē small bathroom vanities planning and fine squirrel brush with natural spice tip (1 mm to 3 mm thick) with color fills track courts. small bathroom vanities Paths meet very elegant, small bathroom vanities with a smoothly varying width and artistic touch, the minimum width of about 1 mm, although small lengths with a giant concentration and wrist support can reach up to 0.2 mm. Subsequently acquired ballpoint pens iekšiņa and its intersection with a syringe needle muscle type, which may be imposed on top of the small clyster bulb pipettes or rubber, or at least dipped small bathroom vanities wire bleeding control. Tracks the course is constant latitude, small bathroom vanities no trace of beauty, but quickly (minutes compared to hours brushes methods) and practical. small bathroom vanities Colors small bathroom vanities - very good is asfaltlaka, bitumlaka, pitch or bitumen solution gasoline, turpentine, acetone or Solvent. This color is not possible pārkodināt, it is absolutely stable, absolutely adhesive, contrasting small bathroom vanities and easy retouching with a scalpel or needle. Pen era is becoming more popular ladies' nail polish. Suspect that the reason is handy bottle shape and the presence of the brush, as this color good fellow can not see where it is and where it is not so bad we're small bathroom vanities doing, and below the pārkodinot can palīst bottom of ferric chloride mordant. Later economy runs high, and there are not only sold fabric, but also PVC insulating tape, then only the blue. When the glue has been recovered so that lend such fall off (so and so so much švakāka nowadays) can nogriest blade with a narrow strip of the tracks and the plates uzlipināt. If shall be dressed quickly, then glue under practically mordant nepalien. In any event, none of hand drawing methods do not fit high circulation is rendered, since the time of consumption and rapid method iekšiņas appearance is inadequate. 2) 50s. Natural small bathroom vanities resin chemistry turns out some tree resin, such as the Siberian cedar, coagulation charm. The resin is mixed with a small amount small bathroom vanities of potassium dichromate, and hot (but not above 45 C begins coagulation) spotted on the plate centrifuge. Getting light-curing process. Displayed for about an hour to two strong sun and develops siltenā water, then secured with chromic anhydride solution (dubiteļ). 3) 60-70 years. Gelatin and egg chemistry. After a short time a similar effect also reveals egg white (though it turns out to pavājš ferric chloride effect), then gelatin and agar-agar finally, to a lesser extent in bone adhesive. Approximately liter photoresist take a few tablespoons of gelatin (2-6, depending on the quality gelatin, it is proper to form a gel) and layer teaspoon of potassium dichromate powder. Last dosed very hard, if not enough, then the layer will be the development of half-baked, if too much, the layer will not develop small bathroom vanities because there will be solid. Therefore, small bathroom vanities for each new batch of raw material out experimental optimum composition recovery - hard earned ķēpīgi. Layer can also overlay plain ordinary pouring to 45 degrees oblique plane with a pot, or the elemental centrifuge with about 30-90 rpm. About centrifuge serves a wide range of player small bathroom vanities who stole the central pumpuci and edges screwed pressure small bathroom vanities springs. Dried in the dark, with forced air circulation, dust-free environment (at least with the car's air filter), displayed in the sunlight small bathroom vanities or 500 W lamps chickens, 0,5m away for 15-20 minutes. Method to the limit of 0.1 mm, and stable results at 0,3mm. 4) 70-90 years. Polyvinyl alcohol chemistry. A similar effect is found in polyvinyl alcohol, small bathroom vanities it gives a resolution of around 0,05mm although stable small bathroom vanities working up to 0.1mm, but the PVA composition is stable enough for the recipe small bathroom vanities of the batch to batch unchanged. It i