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2L HASL Circuit Board

2L HASL Circuit Board

2L HASL circuit board 1.company profile Uniwell circuits Co., Ltd. is one of the most dynamic manufacturing company in high-tech Printed Circuit Board production in Shenzhen, China. We rapidly expand in terms of capacity and technology in recent years, especially in the areas of FPC, Rigid-flex...

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1.Product describe

图片30_副本.jpg 

Specification:
Layer: 2
Board Thickness: 1.6 mm
Surface treatment: HASL.
Material: FR4 .
Min line width/line distance:11/18mil.

Certified by ISO9001, ISO14001, TS16949 and UL it is widely applied in communication, network, digital products, industrial control, medical care, aeronautics & astronautics, defense & military fields, as well.

2.Company profile
Uniwell circuits Co., Ltd. is one of the most dynamic manufacturing company in high-tech Printed Circuit Board production in Shenzhen, China. We rapidly expand in terms of capacity and technology in recent years, especially in the areas of FPC, Rigid-flex PCB. 

Our manufacturing facilities cover over an area of 300,000 square meters, with 600 employees including 15% management and engineers who have professional experience in the field of FPC fabrication with 10+ years at least. We very tightly controls the quality of the products, and have implemented the ISO quality system , many raw material have attained UL and Rosh approval.  

图片31_副本.jpg

3.Reference - Our production capability for PCB board:
1) Layers: 1L-32L
2) Board finished thickness: 0.2mm-8.0mm
3) Material: FR-4,CEM-3, High TG, FR4 Halogen Free, Roger, ISOLA
4) Max. finished board size: 1500X610 mm
5) Min. drilled hole size:0.2MM
6) Min. Line width: 2.5mil,Min.Line spacing: 2.5mil
7) Surface finish/treatment: HASL / HASL lead free,HAL, Chemical tin,Chemical Gold, Immersion Silver/Gold,OSP,Gold plating  
8) Copper thickness: 0.5-8.0 OZ
9) Solder mask color: green/yellow/black/white/red/blue
10) Copper thickness in hole: >25.0µm  (>1mil)
11) Inner packing: Vacuum packing / Plastic bag, Outer packing: Standard carton packing
12) Shape tolerance: ±0.13, Hole tolerance:  PTH: ±0.076   NPTH: ±0.05
13) Certificate: UL, ISO 9001, ISO 14001,SGS , RoHS
14) Special requirements: Buried and blind vias+controlled impedance +BGA
15) Profiling: Punching, Routing, V-CUT, Beveling
16) Provides OEM services to all sorts of printed circuit board assembly as well as electronic encased products

4.Do you know what is HASL
HASL Finish is the predominant ‘leaded’surface finish used in the industry.
HASL stands for Hot Air Solder Leveling. The circuit boards must be immersed in a tin/lead alloy for this finish. ‘Air knives’ then remove the excess solder by blowing hot air across the surface of the board. 

HASL Finish has many advantages when using the printed circuit assembly (PCA) process. It is one of the least expensive surface finishes available and the surface finish remains solderable through multiple reflow, wash, and storage cycles. For an In-circuit test (ICT), a HASL Finish automatically covers the test pads and vias with solder. However, the flatness, or coplanarity, of the surface is poor when compared to available alternatives. This considerably bumpy finish is not only an aesthetic issue, but can also be problematic when sending your boards to assembly. However, it’s corrosion resistance and testability are excellent. 

Lead-free HASL Finish is a great alternative to the leaded HASL Finish. Not only is the coating planarity of most lead-free HASL Finishes reportedly better than leaded HASL Finish, concerns with copper dissolution and heat damage to the circuit boards have largely been overcome with different solder alloys such as SnCuNi, SnAgCuNi or SnCuCo While lead free HASL Finish may not be the best coating for projects with small spacing between components due to its tendency to bridge across the gap during heating, it is currently being used on products with component pitch as low as 0.5 mm. 

The most significant advantage of using a HASL Surface Finish, whether leaded or lead free, is its excellent solderability.

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