Once raw materials arrive at the factory, the processing of A-TECH enig pcb finish goes through four steps: compounding, mixing, shaping and vulcanizing. A smooth part is added on its PTH line to reduce the roughness of through hole2.
With fewer chances of causing fire hazards and electric shock, the product does no harm to human if used properly. It totally conforms to the UL Flame Rating of 94V-03.
The product has a superior quality and has got relative quality certificates. It has low water absorptivity in the damp environment4.
Compared with the competitors, the product is more reliable in quality and performance. It is lead-free and environmental-friendly and has passed SGS test5.
The product is a high quality product with a long service life and stable performance. Being laminated by advanced vacuum lamination equipment, it has a uniform dielectric thickness after lamination
HAL(Lead Free), the full name is Hot Air leveling with Lead Free. Compared with HASL, the main difference for HAL(Lead Free) is the element of material which do not contain Lead(Pb), so it’s RoHS Compliant and it’s much more popular and widely used in PCB manufacturing.
HAL(Lead Free) requires higher run temperatures for lead free solder and longer contact time, the production cost for HAL(Lead Free) is slightly higher than HASL(Tin/Lead).
The manufacturing process of HAL(Lead Free) is similar to HASL(Tin/Lead), the circuit boards will be submersed in molten solder(Lead Free). This solder will cover all the exposed copper surfaces. Upon retraction from the solder, high pressure hot air is blown over the surface through air knives, this levels the solder deposit and removes the excess solder from the surface of printed circuit boards.
The typical thickness of HAL(Lead Free) is 1-40um and the shelf life is 12 months.
The advantages of HAL(Lead Free) surface finish
● Good solderability / wettability
● RoHS Compliant
● Good reflow properties
● Large processing window is allowed
● Multiple thermal excursions
● Can be widely used
The disadvantages of HAL(Lead Free) surface finish
● Uneven surface
● Not suitable for PCBs with fine pitch
● Thermal shock
● Solder bridge
● Plugged or Reduced plated through holes
A-TECH have HAL(Lead Free) surface finish in house, It’s basically the highest proportion of finish used for circuit boards without fine pitch or high density layout. We don’t have any additional cost for HAL(Lead Free) surface finish.
A-TECH CIRCUITS Co., Ltd. is one of the leading-edge companies providing professional supports on the development and manufacture of pcb mask . With the expected increasing markets overseas, the company has made a new record of numerous clients' demands throughout the world. The company predicts that the demands will continue to increase in the coming years.2.
The factory is built under scientific and normalized theories. Based on the condition of its surroundings and actual demand for production, the arrangement of the production line, ventilation, indoor air quality are considered seriously.3.
We have built a wide base of satisfied customers. We take pride in the role we play as our customers' business partners and contribute to the success of their mission. We take a responsible approach in every aspect of our operations. We are committed to managing and reducing production waste as possible.