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A REVOLUTIONARY NEW SYSTEM for CIRCUIT BOARD PROTOTYPING Figure 2

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A REVOLUTIONARY NEW SYSTEM for CIRCUIT BOARD PROTOTYPING Figure 2 ••• Press-n-Peel Etching Supplies Service Tel; (01733) 233043 Fax: (01733) 231096 Figure 1. A REVOLUTIONARY NEW SYSTEM FOR CIRCUIT BOARD PROTOTYPING Figure 2. Press-N-Peel is a major breakthrough with slow firm movements over the in one off Circuit Board whole area of circuit until the copper manufacturing for R & D is too hot to touch. You can tell by departments, Universities, Schools the darkness of the image when the and the home hobbyist. No transfer has stuck, if light areas can expensive materials or equipment to be seen just run the Iron over that purchase, only the type of equipment area again and leave to cool for 5 already used in offices and home is minutes. required to produce.first class PCBs. If you use a CAD output to a laser When cold the film is peeled and the Figure 3 printer you can print direct onto area of inked trackwork or letters are Press-N-Peel (Fig. 1.) or photocopy stuck to the surface of the copper from film onto Press-N-Peel. This (Fig. 4.). If there are nicks or bits product is so versatile you can missing, touch them up with an Etch photocopy a Circuit from magazines resist pen and you are ready to etch. and papers, with minimal effort you This system can be used by school can produce a Circuit that was not children, it is so simple and safe to possible before. use. Etching is by the ordinary method of Ferric or clear Etchant in The laser or photocopied Circuit a tray or bubble etch tank. needs to be as dense as possible for Figure 4 the best results (Fig. 2.). Once the Once the copper has been etched off image is printed onto the circuit to the board you dry it and remove the copper clad material, no more resist resist with PnP Stripper. The blue coated copper, no more light source, resist is stripped away leaving the just plain copper clad material. copper circuit tracks. Lightly scrub the surface with an abrasive block or Scotchbrite to No expensive equipment required. clean and you are ready for the next We supply a full kit of all the stage. materials required to make several PCBs,completewithdatasheets and There is no need to purchase a heat operating instructions. The product Figure 5 transfer press, an ordinary household and process has been on test in our iron will do the job just as well (Fig. own PCB manufacturing facility 3.). Set the Iron to hot, the film with consistently good results on all transfers at approx. 200-250F (Not type of Copper clad materials. centigrade). Lay the film emulsion down onto the copper surface and Press-n-Peel Etching Supplies Service Telephone: +44 (0) 1733 233043 Fax: +44 (0) 1733 231096 Press-n-Peel Instructions 1. Clean the copper board by scrubbing the surface with a wet Scotch-Brite or Steel-wool, thus removing any surface oxidation and surface oil. Some users prefer to etch the cleaned board for 30 seconds to further de-oxidise the copper and provide better adhesion for the transfer process. 2. Press-n-Peel will only work with plain paper copies and laser printers to produce circuit boards. Just about any CAD program can be used to create an image. PC layouts from magazines and dot matrix printed drawings can be used with a photocopier. The copier or printer should be adjusted to give the darkest image without leaving telltale smudges on the non-image/non-trace area. 3. The circuit image should be printed such that trace areas are black lines, and non-trace areas are white. Be sure that the trace image that is produced appears as if you are looking through the PC hoard from the component side and seeing the pattern, thus writing will appear as a mirror image. If you need to reverse the board, print onto clear film first and place the clear film on top of the glass. The image is placed on the emulsion side Pull side) of the Press-n-Peel material. 4. Place Press-n-Peel into the copier or laser printer and proceed to print/copy the image, just as with plain paper. A single sheet at-a-time works best with most machines. Some machines require a piece of paper as a backing, sheet to properly feed. Do not use the same piece twice as it can have curled corners and will jam. 5. Cut the image out of the sheet leaving a minimum of 20mm around the circuit pattern. Never print to the edge of the film. Have a clean piece of circuit board ready for application. A household clothes iron is used to apply Press-n-Peel. The best place to start is with a setting in the lower region of "Steam". Usually about 200-250 degrees F. (Not Centigrade.) Press-n-Peel also supplies a hot roll laminator for R & D departments, universities, schools etc. For large numbers and a professional finish. The temperature setting is dependent upon the type of toner used in your copier or laser printer. 6. Place Press-n-Peel with the image face down (image contacting the circuit board material). Place the board with film on top of a piece of wood or similar insulating material. Carefully apply the hot iron to the backside of the film (shiny side up), concentrating on one corner first until adhered. Continue to apply the heat with the iron using a circular motion, especially towards the outer edges, you should see dark areas through the film, where the film has bonded. Keep the iron moving, do not leave it in one place to long as this can cause the copper to lift. 7. The image will become dark and pronounced through the film back. Evenly heat the entire surface of the board to a consistent temperature. 8. Allow the board to go cold before attempting to remove the backing film. Lift a corner slowly, at this stage if the film has not bonded properly it can be re-ironed on, before removing the backer. After the backer has been removed any defective areas can be touched up with an etch resist pen. Do this before etching. 9. The board is now ready for etching. Place in a tray containing Press-n-Peel Etchant, see Technical Information for make up. Remove resist using a paper wipe dipped in P-n-P stripper. Board is now ready. for drilling and component insertion. 10. For further information on using this or any other Press-n-Peel product please contact P-n-P's technical help-line on +44 (0) 1733 233043.
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