Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by limct

  1. limct

    ASTM standard test method for ceramic flexural strength

    hi all, I am looking for the testing method for flexural strength of ceramic and I come across several different type. Does anyone know the difference between ASTM-F417, ASTM-F394 and ASTM-C1161? Another question is, whether the speed of the loading will influence the flexural strength of the...
  2. limct

    cleaning of flux residue of SAC305

    Hi, Does anyone know of an effective method to clean the flux residue of a SAC305 solder joint? I need to totally remove the residue in order to ensure no delamination effect of the silicone rubber layer and the solder joint. Thank you! Best regards, ct
  3. limct

    Detecting delamination

    Thanks Unclesyd. Best regards, ct
  4. limct

    Detecting delamination

    Thank you very much Ron. Happy new year! Best regards, ct
  5. limct

    Detecting delamination

    Cloa: It's a type of ceramic. Best regards, ct
  6. limct

    Detecting delamination

    Hi, I'm looking for ways on how to detect delamination effect of a clear silicone rubber layer adhered to a white color surface. Can anyone shed some light here? Thanks! Best regards, ct
  7. limct

    Solder joint at 120 degree C, any solder paste to recommend?

    OK, let me rephrase this, I'm looking for a type of solder paste which can pass at least 500 hrs Hi temp operating life test in a system where the solder joint is subject to 120 degree C. Any recommendation? Best regards, ct
  8. limct

    Solder joint at 120 degree C, any solder paste to recommend?

    Hi, I'm looking for a type of solder paste which is tested and found pass under 120 deg C operating condition for long hours. Can any one shed some light here? Best regards, ct
  9. limct

    CTI Vs PTI

    Hi, Can anyone shed some light here about what's the difference between these two? Thanks in advance. Best regards, ct
  10. limct

    MacAdam ellipse

    Hi, Anyone has an idea to draw MacAdam ellipse in excel? Best regards, ct
  11. limct

    SMT line reflow

    Sorry for leading you gys to the lousy file hosting site. ya, in fact, i wasn't happy either with the too much of the ads. Scotty, Perhaps I should give you more info in order for you "investigate" further. 1) The boards are made by one PCB manufacturer, a same batch of boards run by the two...
  12. limct

    SMT line reflow

    Hello Scotty, Yes, the affected are is actually with OSP finish and not covered with solder during the reflow. The two sub-cons are running the process in the same manner, no washing no drying process. Both use lead free solder paste but of different brand and are given the liberty to tweak the...
  13. limct

    SMT line reflow

    Hi all, I'm not sure if this is the right place to ask this question, but here is how it goes: I have two SMT sub-con houses who are equal in terms of their equipment. My product is a two layer PCBs which the top and bottom copper are OSP treated. The issue I'm facing is that one of the sub-con...
  14. limct

    hidrogen embrittlemnet in fastener

    Is there a way/test to find out if a screw has a risk of hydrogen embrittlement attack? Best regards, ct
  15. limct

    PCB warpage

    Hi, Has anyone got any data to show whether temperature cycle or constant high temperature would cause bigger impact to warpage on FR4 PCB. Best regards, ct
See more

Part and Inventory Search

Back
Top