Shenzhen Grande Electronic Linkedin Page
Shenzhen Grande Electronic Co., Ltd logo
E-mail us for a Quote:
sales88@greattong.com
Call us now:
+86-755-83261869

Technical Article


Raw Material Choices for PCBs

Time:2017-08-05 13:30:59 Click:

Choice of Materials and Usage of Panels 
This chapter relates the best practices for choosing materials to manufacture multilayer PCBs that achieve two critical requirements: (1) limit manufacturing problems (e.g., bowing or twisting, as well as mis-registering; and (2) coming up to the standards of performance. 

The most important material for PCB manufacturing is raw laminate. It also represents the largest cost of all other materials needed to produce a multilayer PCB. Raw laminate has a critical impact for the prices and the delivery time of PCBs. Therefore, it is important to consider how its construction can be optimized by using regular raw materials, as well as maximizing the usable region of the PCB relative to regular panel dimensions. 

The next element to consider is the dielectric thickness, which must be specified for impedance requirements. The dielectric thickness should be chosen from PCB manufacturers that have base laminates or prepreg thicknesses available. Multilayer materials range from 0.125mm to 1mm in thickness. Thin laminates (i.e. 0.1mm or less) are necessary for some low-power applications as well as the continued densification of multilayer circuit PCBs. Thin laminates (which sometimes are referred to as ultrathin) can be purchased with a single ply of glass fabric only. 

The specification of different materials should not disappoint PCB engineers from asking for price quotes. Many times, different and low-cost alternatives are available due to the continuing engineering projects. 

Engineers should incorporate Environmentally-Conscious Manufacturing (ECM) into their designs because clients will then use designs and procedures that do not create a lot of excess waste materials. For example, if an engineer uses the lightest copper weight (0.5 oz) available, he will see the lowest amount of chemical use, as well as the creation of wasteful by-products. The selection of solder impacts the amount, toxicity and emission of solvents. The selection of anti-tarnish in lieu of hot air solder leveling (HASL) will decrease the amount of lead used and its emission from the fusing oil and the flux. 

Previous:Plated Half Holes PCB

Next:Suggested 14 and 16 Layer PCB Layouts


Request an Official Quote

Questions

E-MAIL

File Upload

Upload a list of files

    Please upload your Gerber files and BOM. You can upload an unlimited number of files as long as the total size of all files does not exceed 20 MB. To ensure you receive your official quote in less than 24 hours, please include the quantity of circuit boards for which you would like a quote.

    If you require that we sign a Non-Disclosure Agreement (NDA), please send it to us prior to sending your files and we will be happy to accommodate.

     
    Home About us Services Quality Pb-Free News Contact us


    Copyright ® 2017,Shenzhen Grande Electronic Co., Ltd. All Rights Reserved. 中文站 Sitemap