American Made Advocacy: Success in Washington Requires Patience, Persistence, and Sustained Focus
The Government Circuit: News on Defense Electronics, Europe, and Sustainability
Defense Speak Interpreted: SWaPing Nanosatellites for Defense Systems
ZESTRON South Asia releases whitepaper – Impact of Cleaning Technology on Discrete Packaging - The Difference in Wire Bonding Yield
December 2, 2024 | ZESTRONEstimated reading time: 1 minute
ZESTRON, the global leading provider of high precision cleaning products, services, and training solutions in the electronics manufacturing and semiconductor industries, is pleased to release the whitepaper “Impact of Cleaning Technology on Discrete Packaging - The Difference in Wire Bonding Yield”
Whitepaper Abstract:
Lead frame packages are commonly used in semiconductor package fabrication, where interconnections between the integrated circuits (IC) and the metal leads are typically established through die attach and wire bonding processes. Standard materials like epoxies, adhesives, or solder pastes are most often used in the die attach process. However, it is critical to remove any flux residues left behind after soldering before proceeding with wire bonding and molding to ensure maximum yield in packages that use solder paste for die attachment. One of the most widely used cleaning agents to remove flux residues is isopropyl alcohol (IPA). While IPA is commonly used as a general cleaner in the electronics industry, it is not the most effective solution for flux removal.
Semiconductor package manufacturers produce millions of units daily and therefore, a small improvement in the wire bonding yield can significantly impact production efficiency and the overall product costs.
One such OEM was producing lead frame packages and using IPA (Isopropyl alcohol) in the ultrasonic cleaning process. However, their process resulted in a wire bonding yield of only 98%, measured after the molding and deflashing processes. This indicated significant motivation to improve the cleaning process and the wire bonding yield.
A Design of Experiment (DOE) was developed to assess alternative cleaning agents and process equipment, aiming to optimize the cleaning process and to be evaluated based on the improvement in wire bonding yield. Process qualification was conducted through a pull test according to the MIL-STD-883E method 2011.7. Throughout the DOE process iterations, process improvements were identified through visual inspection, pull and shear testing as well as overall yield measurement from the wire bonding process.
Share on:
Suggested Items
Statistically Testing Inner Layer Yield Improvement Projects
12/18/2024 | Dr. Patrick Valentine, UyemuraCan we trust our measurement system to give us reliable data? Is it accurate, repeatable, and reproducible? Measurement is the foundation of quality. We measure for two primary reasons: to make decisions on product quality and to provide data that will inform continuous improvement projects. We can engage in continuous improvement projects if we are confident in our measurement systems.
SCHMID Group Unveils Enhanced InfinityLine H+ for Electroless Copper Deposition
12/16/2024 | SCHMID GroupThe SCHMID Group, a global leader in high-tech solutions for the electronics industry, proudly announces significant updates to its flagship InfinityLine H+ Electroless Cu system. Specifically designed for the production of high- performance advanced packaging applications using mSAP and SAP processes, the system reflects SCHMID’s expertise in horizontal electroless copper deposition.
ASMPT: Backchannel Production Planning in Electronics Manufacturing with WORKS
12/16/2024 | ASMPTThe WORKS Software Suite from ASMPT raises production planning in electronics manufacturing to a new level. With its seamless integration of ERP systems and continuous data feedback loop, the software optimizes the planning process in real time – from receiving an order to starting its production run.
Successful Pre-acceptance of TSK Schill GmbH Production Line for Moulded Etched Parts
12/16/2024 | TSK Schill GmbHThe specialist for horizontal wet systems for the production of printed circuit boards, chemical milling and moulded etched parts, TSK Schill GmbH from Gäufelden-Nebringen, is installing new production systems at one of the leading manufacturers of precision metal parts.
Inner Layer Precision & Yields Explored in December 2024 Issue of PCB007 Magazine
12/16/2024 | I-Connect007 Editorial TeamBuilding accuracy into your inner layers as well as being able to assess their pass/fail status as early as possible is critical. In this month’s PCB007 Magazine, we take a close look at building precision into your inner layers.