Reading time ( words)
One of the biggest challenges facing PCB designers is not understanding the cost drivers in the PCB manufacturing process. This article is the latest in a series that will discuss these cost drivers (from the PCB manufacturer’s perspective) and the design decisions that will impact product reliability.
PCB Plating Methods
There are two methods of plating copper on PCBs—pattern plating and panel plating. The panel plating method eliminates most of the copper plating distribution issues, but because it adds copper thickness to the base layer, it makes maintaining fine line definition and consistency difficult. Base copper is measured in ounces of copper per square foot of surface area.
This standard process has major advantages in that only the base copper is required to be etched. This process yields finer, better-defined lines (traces). One possible disadvantage is the variations in trace height due to surface density.
This plating fabrication method eliminates most of the copper plating distribution issues but now the excess surface copper (after the circuit pattern is defined) must be etched along with the base foil. This makes maintaining fine line definition and consistency difficult.
To read this entire article, which appeared in the February 2022 Design007 Magazine, click here.
Kyle Burk, KBJ Engineering
As mentioned in the May issue of Design007 Magazine, design is performed, at times, in a vacuum. But it doesn’t have to be that way. Whenever circumstances allow, design should be performed by communicating with all stakeholders throughout the design process, hence the emphasis on the word with in DWM. Communication can occur through personal correspondence such as email and voice conversations or through more formal design meetings—in person or through videoconferencing. No matter which means of communication you prefer, it’s important to communicate early and often with stakeholders involved in the downstream processes as you bring your project to realization.
Scott Miller, FreedomCAD Services
There is a new acronym bubbling up in the design world: DWM, which stands for “design with manufacturing.” Why is this different than design for manufacturing, or DFM? With DWM, the emphasis is on integration between the design team and the manufacturers during the design process. DWM is much more than that. We are tasked with producing designs that meet various technical requirements, yet are cost-effective and manufacturable. We provide this service to hundreds of customers who have varying degrees of processes, tools, and manufacturing partners. Given this diversity, we have recognized the importance of designing with manufacturing to achieve the product development goals of manufacturability and technical excellence.
I-Connect007 Editorial Team
Chapter 2 of 'The Printed Circuit Designer’s Guide to… High Performance Materials' explores the varieties of woven glass fabrics and their components, and why spread glass is in such high demand for high-speed digital PCB designs. Download this book for a clearer picture of what to know when selecting which material that is most desirable for upcoming products, and obtain a solid knowledge base for making material selection decisions.