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RoHS Compliance and Lead Tinning

Another reason for lead tinning is for the conversion of components with lead finishes that are lead bearing in order that they be compatible with “lead free” RoHS compatible assemblies.

Tin dipping of components in RoHS compatible solder is one means to turn the lead bearing components in to devices which can be used in a RoHS compatible soldering process. The conversion of lead bearing components in to those which can be used in the lead free soldering process is what this controlled process can result in.

BEST can provide the lead tinning services for turning your lead-bearing component covered leads in to ones that reduce the lead levels to below the 0.1% by weight RoHS guidelines. In this scenario BEST can perform XRF measurements in order to determine the elements in the solder on the existing leads. In XRF measurements X-rays, which form part of the electromagnetic spectrum and are expressed in terms of their energy or wavelength XRF (X-ray Fluorescence) are a consequence of changes that take place within an atom. When a high energy X-ray collides with an atom it disturbs the stability in the outside electron energy levels. An electron is ejected from a low energy level and a space is created. As a result an electron from a higher energy level (eg L shell) falls into this space. The trick is trying to measure them and identify which element/s are being dealt with. A “signature” is then an output of this measurement resulting in a idea of what elements are present in the sample. XRF measurements are made in a pinpoint area of the sample and report a percentage of elements on the sample being measured.

xray flourescence

Sample XRF Raw Output

This analysis can confirm post tinning that the percentages of the non-allowed RoHS2 substances are within the specified RoHS limits. Your components will be processed on a robotic machine using a double dip process in order to sure proper solder coat adhesion. The first dip is into a cleansing bath of molten alloy to remove the original coating, followed with a flux dip then a final immersion into a clean solder bath for a pure eutectic or RoHS2 finish. The led tinning will then insure that the component is RoHS2 compliant.

 

 

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    BEST has solid high quality service every time, and at the right price. They are very dependable. I am able to start a project in less then 24 hours with no hassles. The teams always work to meet the demands placed on them by the customer, and are very honest about what they can do and when they can do it. They offer great value to the customer; they are willing to go the extra mile to make the customer happy.

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  • Best has always come through when we needed them. We started using them for board repairs, now they assemble all of our boards. BEST is always responsive to our needs. On many occasions, we needed... View More..

    Best has always come through when we needed them. We started using them for board repairs, now they assemble all of our boards. BEST is always responsive to our needs. On many occasions, we needed boards repaired immediately. They have always come through for us.

    Lovejoy Controls Corporation

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Lead Tinning of QFP

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  • You Guys Freaking Rock with turnaround time.
    Thank you all SOOOOO much!!

    You Guys Freaking Rock with turnaround time.
    Thank you all SOOOOO much!!

    Welch Allyn

  • BEST is excellent in meeting delivery dates and are very good with clear communication of... View More..

    BEST is excellent in meeting delivery dates and are very good with clear communication of shipments, quantities, issues, etc. Their quality and technical assistance has been superb.

    RW Technologies

  • BEST has solid high quality service every time, and at the right price. They are very dependable. I... View More..

    BEST has solid high quality service every time, and at the right price. They are very dependable. I am able to start a project in less then 24 hours with no hassles. The teams always work to meet the demands placed on them by the customer, and are very honest about what they can do and when they can do it. They offer great value to the customer; they are willing to go the extra mile to make the customer happy.

    Motorola

  • Best has always come through when we needed them. We started using them for board repairs, now they... View More..

    Best has always come through when we needed them. We started using them for board repairs, now they assemble all of our boards. BEST is always responsive to our needs. On many occasions, we needed boards repaired immediately. They have always come through for us.

    Lovejoy Controls Corporation

  • Your company name exemplifies exactly what you are, the BEST!!!

    Your company name exemplifies exactly what you are, the BEST!!!

    Alpha Circuits

  • You guys are really soldering geeks. Keep inventing those cool products.

    You guys are really soldering geeks. Keep inventing those cool products.

    Analog Devices

  • …always are very friendly and try to accommodate my short lead times

    …always are very friendly and try to accommodate my short lead times

    Qualcomm

  • There was not doubt that Francisco know the material, how to present it, and how to make the class... View More..

    There was not doubt that Francisco know the material, how to present it, and how to make the class participants feel at ease..all of my guys came to me and how me how much they had learned.

    Alabama Power

  • Just wanted to let you know what a fantastic job/effort James put in too insure our guys were... View More..

    Just wanted to let you know what a fantastic job/effort James put in too insure our guys were thoroughly training and qualified. Everyone involved was very impressed with his knowledge, flexibility, and work ethic. We really appreciate the fact that he went above and beyond.

    EMAC

  • Man, you guys are unbelievably fast!

    Man, you guys are unbelievably fast!

    Blur Development Product

  • I just wanted to shout a big thank you for your and BEST's efforts for making a flawless stencil... View More..

    I just wanted to shout a big thank you for your and BEST's efforts for making a flawless stencil and a quick delivery! You were a huge help. We greatly appreciate it!

    Evaporative Coating

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