What do you use to solder platinum golds?

Platinum is a very good conductor material, its ductility is the highest of all pure metals, better than gold, silver and copper, often processed into very fine platinum wire to use. It is extremely corrosion-resistant and stable at high temperatures, and its electrical properties are also stable. It will not oxidize at any temperature, so because of its unique chemical and physical properties, platinum is widely used in the medical industry, semiconductor welding, aerospace and military electronics industry. Such as various sensor chip leads, pacemakers and so on.

Gold wire and pads can not be welded or welding is not strong, mainly the choice of welding power supply is not sophisticated enough, followed by the control accuracy of the pressure of the welding mechanism and the structure of the electrode three reasons. Secondly, the welding efficiency is very low, because the product pad size is mostly below 1mm, 0.2 wire is a relatively thick wire diameter, there is a great challenge in the operation. Platinum wire one end of the welding is completed also need to be welded with copper legs, this will need to be based on product characteristics and welding requirements to design a suitable welding program.

Copper foot and ceramic chip and not copper, need different welding mechanism to match. Both ends need to be welded material are different from the platinum wire, and the melting point difference is large, according to continuous verification, the need for resistance welding process to complete the welding of this product.

With this platinum wire welding method, the weld joints are very strong and beautiful, and the consistency of the weld joints is very high. Because the resistance welding process is to be welded with the electrode hold, the pressure is applied at the same time as the electricity, welding is a rapid discharge of high current (low voltage), due to the metal to metal contact parts of the resistance is relatively large and heat, melting is welded together. This process has a short welding time, requires no other auxiliary materials, and is easy to operate and automate.

Platinum wire welding requirements are very high, no soldering, solid welding joints, and easier to operate to improve productivity. These requirements of the welding equipment with good stability and ease of operation:

Welding power supply needs to be precise control of the current, precise control of the welding time.

The welding mechanism can accurately control the welding pressure, accurate control of repetitive positioning. At the same time, because of the small size of the product, the requirement for easy welding operation needs to be equipped with ccd and microscope.

Additionally similar precious metal wire welding tungsten welding, nichrome wire welding, gold wire welding, etc.

Different materials and sizes of wire welding process methods are different, welcome to leave a message to discuss.