FinePitch Electronic Assembly - Lead Free Assembly

By: Finepitch Assembly  09-12-2011
Keywords: circuit board, Printed Circuit Board, Printed Circuit

The RoHS legislation requires that none of the hazardous materials listed in the RoHS Directive are used in the

printed circuit board

, components or solder. This means that the finishes on bare

printed circuit boards

must be changed to comply with

lead free

and RoHS standards. As a result, higher temperatures, around 30-50 degrees higher, are usually required to

assemble lead free printed circuit boards

. All components and boards must be able to withstand this additional heat. Also, it is important to note that the IC moisture sensitivity level that indicates how long the board can be exposed to the air is approximately 2 classes higher for

lead free printed circuit boards

, so there can be increased moisture sensitivity. The shelf life of the materials used in

lead free

boards may also be shorter.


lead free assembled

board may look differently. This is because the

lead free

solder has a different metallic composition. Please keep in mind that our technicians are experts at quality control and will guarantee that all

lead free assembly

is performed accurately to your exact specifications.

  1. Customers either supply the correct lead free parts or we will order them for you.
  2. Using a lead free pcb, we apply a stencil to the board using a lead free compatible solder paste alloy – SAC305 and SAC304.
  3. All lead free parts are then machine-placed for accuracy.
  4. The stuffed board is then placed in the oven at a higher than normal temperature, to achieve the correct metallic bond between the components and the boards.
  5. We also perform thru hole and hand or wire soldering on lead free printed circuit boards.
  6. Finally, each board is visually inspected for quality.

Keywords: circuit board, circuit boards, Printed Circuit, Printed Circuit Board, Printed Circuit Boards

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