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Soldering

Soldering. Rachael Fleischmann Rohan Thomare Elliot Fish. Overview. General Soldering Why it is important Tools required How to solder Removing solder Good vs. bad Cold joints Forms of Solder Solder paste Lead free solder. General Soldering. Why is it useful.

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Soldering

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  1. Soldering Rachael Fleischmann Rohan Thomare Elliot Fish

  2. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  3. General Soldering

  4. Why is it useful • Soldering is a must have skill for types of electronics work. • In this class you may need to solder wires • to a circuit board or to other wires

  5. Example of Solder • Connecting an LED to a circuit board • http://www.gamingwithdrawal.com/news/2012/01/led-changer-for-ps3-released/

  6. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  7. Tools - Soldering Iron • http://science.howstuffworks.com/cold-heat1.htm http://science.howstuffworks.com/cold-heat1.htm

  8. Tools - Sponge • http://shop.rabtron.co.za/catalog/toolsequipment-c-45.html http://shop.rabtron.co.za/catalog/toolsequipment-c-45.html

  9. Tools - Solder • http://parts.digikey.com/1/parts-kws/solder

  10. Tools - Soldering Iron Holder • http://www.rivieratrading.co.uk/Soldering-Iron-Stand.html

  11. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  12. Prepare • Selecting the correct solder size • Clear space • Turn on the iron • Coat the tip of the soldering iron • http://www.rchelisite.com/how_to_solder_properly_tips_and_techniques.php http://www.rchelisite.com/how_to_solder_properly_tips_and_techniques.php

  13. Steps of Soldering • Clean the surface • Place the component on the board • http://www.instructables.com/id/How-to-solder/step4/Soldering-components-onto-a-circuit-board/

  14. Steps of Soldering • Apply heat to the connection • Add solder to the joint • http://www.examiner.com/gadgets-in-chicago/five-projects-for-getting-into-soldering

  15. Steps of Soldering • Remove the solder, than the soldering iron • Check the joint • http://store.curiousinventor.com/guides/how_to_solder/heat_solder

  16. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  17. Removing Solder - Tools • Soldering Iron • Solder wick http://www.step-easy.com/glass/stained-glass-supplies-20.htm

  18. Removing Solder - Steps • Heat up solder wick • Place the wick against the joint http://pink.myshoesaretootight.com/mirrors/amiga.serveftp.net/Fit_PLCC_socket.html

  19. Removing Solder - Steps • Apply heat to the part of the wick that covers the joint • Repeat using a new area of the wick, if solder still remains • http://en.wikipedia.org/wiki/File:Solder_wick-close_up-solder_impurities_PNr%C2%B00112.jpg

  20. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  21. Good vs. Bad Joints • http://www.kpsec.freeuk.com/solder.htm

  22. Good vs. Bad Joints • http://www.justanswer.com/tv-repair/34s2p-mitsubishi-ws-a55-multiple-techinicians.html

  23. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  24. Cold Joints • Why • Occurs due to lack of heat when applying • Component moving before completion of process • Heat expansion and contraction of joint • Hard oxide shell builds up • Cons of Cold Joints • Prone to physical failure • Lead to dead joints

  25. Results of Cold Joints • Comparing good to bad • Cold joints lead to high resistance • Leaves a brittle joint • Can cause a circuit to fail completely • Other point • Don't apply too much solder.

  26. Normal and ColdJoints http://commons.wikimedia.org/wiki/File:Cold_solder_joint.jpg

  27. How To Fix • The joint • Remelt joint • Apply more solder in correct fashion • If too much solder... • De-solder, remove excess solder, and solder again in correct fashion Heat up joint and apply more solder around expanded area. http://www.tegger.com/hondafaq/mainrelayoperation/badmainrelay.html

  28. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  29. Using Soldering Paste • What is soldering paste? • A mixture of solder particles and a specialized flux. • Mostly used in PCB (Printed Circuit Board) assembly. • High pined components • Large amount of components • Used inside of reflow soldering techniques. • Contact pads connect components • Then solidified in controlled heat • Paste transferred by pin,jet printing, or paste slider

  30. Using Soldering Paste (cont) • Solder paste should be stored in airtight container at low temperatures. • If exposed to air the solder oxidizes • Sensitive to certain temperatures • Room temperature storage causes flux to degrade • Solder paste has a "use by date" • Don't use solder paste past expiration!

  31. Solder Paste Process • http://www.radio-electronics.com/info/manufacture/soldering/solder_paste/

  32. How to Use Solder Paste • Solder paste is applied to the desired destination • Apply only to where required with paste andstencil. • Components are placed • Using stencil • Don't knock board • Product is heated • Using reflow technique • Bond is solidified during cooling stage of process • The board is soldered within a few hours of being cooled

  33. Overview • General Soldering • Why it is important • Tools required • How to solder • Removing solder • Good vs. bad • Cold joints • Forms of Solder • Solder paste • Lead free solder

  34. Lead Free Soldering • Lead-Tin Alloy Solder Pure Tin Soldering http://en.wikipedia.org/wiki/Soldering

  35. Lead Free Soldering • Legislation passed • July 1, 2006 -EU • WEEE (Waste Electrical and Electronic Equipment) and RoHS (Restriction of Hazardous Substances) directives • Materials used • Primarily tin • Includesmetals such as: copper, silver, bismuth,zinc, etc.. • Applications today • Use in electronic devices • Not in critical situations • Aerospace Projects • Medical Projects http://en.wikipedia.org/wiki/WEEE

  36. Summary and Conclusion • General Soldering • Why it is important • Tools required • How to solder • Good vs. bad • Forms of Solder • Solder paste • Lead free solder

  37. References • http://www.aaroncake.net/electronics/solder.htm • http://en.wikipedia.org/wiki/Solder • http://en.wikipedia.org/wiki/Soldering • http://www.kpsec.freeuk.com/solder.htm • http://www.polkaudio.com/forums/ • http://www.radio-electronics.com/info/manufacture/soldering/solder_paste/

  38. Questions?

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