-
- News
- Books
Featured Books
- design007 Magazine
Latest Issues
Current IssueMechatronics
Our expert contributors discuss the advent of mechatronics in PCB design, the challenges and opportunities this creates for circuit board designers, and the benefits—to the employee and the company—of becoming a mechatronics engineer.
Creating a Culture of Collaboration
PCB designers could learn quite a bit from NASA and the private companies that develop spacecraft: Every one of these vehicles is a testament to the value of collaboration among disparate stakeholders. Without a collaborative culture, the rocket might never get off the ground.
Breaking High-speed Material Constraints
Do you need specialty materials for your high-speed designs? Maybe not. Improvements in resins mean designers of high-speed boards can sometimes use traditional laminate systems. Learn more in this issue.
- Articles
- Columns
Search Console
- Links
- Events
||| MENU - design007 Magazine
DFM 101: Final Finishes—ENIG and ENIPIG
August 3, 2022 | Anaya Vardya, American Standard CircuitsEstimated reading time: 1 minute
![](https://iconnect007.com/application/files/2816/9086/9830/Anaya_Vardya-300.jpg)
Introduction
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.
Purposes of Final Finishes
Final finishes provide a surface for the component assembler to either solder, wire bond, or conductively attach a component pad or lead to a pad, hole, or area of a PCB. The other use for a final finish is to provide a known contact resistance and life cycle for connectors, keys, or switches. The primary purpose of a final finish is to create electrical and thermal continuity with a surface of the PCB.
There are several final finishes in use in the industry today, including:
- ENIG (electroless nickel, immersion gold)
- ENIPIG (electroless nickel, immersion palladium, immersion gold)
- ENEPIG (electroless nickel, electroless palladium, immersion gold)
- ImmAg (immersion silver)
- ImmSn (immersion tin)
- Sulfamate Nickel/Hard or Soft Gold (electrolytic nickel/gold)
- HASL (hot air solder leveling)
- SnPb (63/37 tin/lead)
- LF (lead free)
- OSP (organic solderability preservative)
To read this entire article, which appeared in the July issue of Design007 Magazine, click here.
Suggested Items
Altus Highlights Success of Essemtec's I2S in the UK and Ireland Market
07/23/2024 | Altus GroupAltus Group, a leading distributor of capital equipment for the electronics industry in the UK and Ireland, is pleased to highlight the success of Essemtec's Integrated Inspection System (I2S).
Automatic Paste Transfer and Quick Change Squeegee for ASMPT Printers
07/23/2024 | ASMPTASMPT, the market and innovation leader in SMT manufacturing technology, has added two new features to its proven DEK printing platforms that automate solder paste transfers and simplify squeegee changes.
New Breakthrough in Double-Sided Reflow Part Retention from Alltemated
07/19/2024 | AlltematedAlltemated's PLACE-N-BOND™ underfilm passed testing and was implemented in volume production to aid in component retention during the second pass reflow of printed circuit assemblies. This successful testing and implementation occurred in various applications with components such as capacitors, inductors, transformers, connectors, and larger ICs.
Book Excerpt: The Printed Circuit Assembler’s Guide to... Factory Analytics, Chapter 2
07/17/2024 | I-Connect007 Editorial TeamIn this chapter, we’ll focus on the most important analytics at the forefront of SMT, from the solder paste machine to placement machines, and breakdown these metrics from the perspectives of the different decision makers involved in the process. The lead SMT shift manager isn’t going to have the same concerns as a quality manager, so it’s important to look at how each machine and operation contains valuable KPIs for each role.
SMTA Heartland Chapter Announces Rescheduled Date for High Reliability: Virtual STAR Forum
07/10/2024 | SMTAThe SMTA Heartland Chapter announces the rescheduled date for the High Reliability: Virtual STAR Forum, following the overwhelming success of our May event. Join us on Tuesday, July 30, 2024, for an afternoon of engaging discussions and expert insights into high-reliability manufacturing.