Electronics Assembly Knowledge, Vision & Wisdom
Reliability Improvements by the Creation of Intermetallic Connections
Reliability Improvements by the Creation of Intermetallic Connections
The possibilities to combine small and large passive components, and new devices for active components with an increase in reliability is discussed.
Materials Tech

Materials Tech programs cover topics including:
Adhesives, Chemicals, Cleaning Solutions, Coatings, Components, Design, Embedded Technology, Fasteners, Finishes, Flex Circuits, Flip Chip, Fluxes, PC Fab, Solders, Solder Masks, Solder Paste and more.
Submit A Comment
Comments are reviewed prior to posting. You must include your full name to have your comments posted. We will not post your email address.

Your Name


Your Company


Your E-mail


Your Country


Your Comment



Authored By:
Jorg Trodler, Dipl.-Ing.
Heraeus Deutschland GmbH&Co.KG
Hanau, Germany

Dr. Ing. Habil Heinz Wohlrabe
Technical University Dresden
Dresden, Germany

Summary
Especially for the SMT new trends like miniaturization 0201, 01005, 0201 (metrics) for passive components, as well as new devices for actives like LGA or QFN, it requires a lot of investigation for researching, developing, questioning about application, product/component mix, and finally about reliability. One major challenge is the combination of small, medium and large components in one production step. For example, large components need more solder paste, based on a thicker stencil than small components.

Several studies have shown, that properties for reliability at a temperature cycle e.g. -40/+125 prolonged its lifetime by increasing an intermetallic phase (IMP) between substrates and component finishes (e.g. Papers Trodler SMTAi 2012-14). This paper will show and discuss the possibilities by application to combine small and large passive components, and new devices for active components with an increase in reliability, especially for automotive/industry requirements by an IMP formation.

Conclusions
Based on the positive results for reliability and the challenge for more complex boards without using different types of paste (powder size) and stencils, more assembly steps, a project has been started for harmonizing and searching the limits with solder paste and one stencil thickness as well as different openings in the stencil. With those results, the process flow can be described and additional reliability test could be follow to proof an increasing for bigger component as well.

Initially Published in the SMTA Proceedings

Comments
No comments have been submitted to date.
Free Newsletter Subscription
Every issue of the Circuit Insight email newsletter will bring you the latest information on the issues affecting you and your company.

Insert Your Email Address

Directory Search


Program Search
Related Programs
bullet Reliability Improvements by the Creation of Intermetallic Connections
bullet Review of Tin-Copper and Tin-Nickel Intermetallic Thickness
bullet What Causes Solder Icicles During Wave Soldering
bullet Trouble With Skewed DPAK Components
bullet Solder Column Attachment for Absorbing Large CTE Mismatch
bullet Challenges for Bottom Termination Components
bullet Can Mixing Wave Solder Pallets Cause Contamination?
bullet Position Accuracy Machines for Selective Soldering Fine Pitch
bullet Hand Soldering Reliability
bullet The Versatile Preform
More Related Programs