On 24-Dec-2016 TH has certificate of Registration  Trusted brand index manager system.

Solder paste is used in the manufacture of printed circuit borads to connect surface muont  components to pads on the board. It is also possible to solder through-hole pin in paste  components by printing solder paste in and over the holes. The sticky paste temporarily holds components in place; the board is then heated, melting the paste and forming a mechanical bond as well as an electrical connection. The paste is applied to the board by jet printing, stencil printing, or syring; then the components are put in place by a pich and place machine or by hand.

Solder wire is a fusible metal alloy used to create a permanent bond between metal workpieces. Solder is melted in order to adhere to and connect the pieces after cooling, which requires that an alloy suitable for use as solder have a lower melting point than the pieces being joined. The solder should also be resistant to oxidative and corrosive effects that would degrade the joint over time. Solder used in making electrical connections also needs to have favorable electrical characteristics