circuitnet
Sponsor
Viscom
Your Partner for All Inspection Tasks
AOI from Viscom for the Best Cycle times and Maximum Inspection Depth. See 3D AXI, 3D AOI and 3D MXI at IPC APEX EXPO. Visit booth 2820. March 18-20.
Viscom
Plasma Etch
Sponsor
Circuit Technology Center
Safely Remove Underfilled BGAs Without Damaging the Circuit Board
Learn how cold precision milling techniques enable the removal of underfilled BGAs while minimizing risk to components, circuit traces, and board integrity.
Circuit Technology Center

Ask the Experts Member

QUESTIONS
  
SUBMIT
  
MEMBERS
  
JOIN
Stephen Schoppe

Stephen Schoppe


President
Process Sciences, Inc.
Stephen Schoppe is President of Process Sciences, Inc., and has 19 years experience providing SMT services to electronics manufacturers. Stephen provides consulting to several Fortune 500 clients on solder and SMT processes, and is a frequent guest speaker at SMT industry events.

Stephen Schoppe has submitted responses to the following questions.
Water Wash vs. No-clean
From a CM point of view there would be no reason to add the extra step of cleaning to the ...
Tough Hand Soldering Problem
To offer possible solutions I would need to understand the surface finishes, solder materials and details about your process methods. ...
How To Rework SMT Connector with Center Ground Strip
Reworking the connector you describe is similar to reworking an array device. I would recommend hot air as the heating ...
Legend Marking Discoloration
I will make the assumption that you are using hot air to perform the rework. If this is true you ...
BGA Joint Voids - Accept or Reject?
What you have heard about voids increasing mechanical reliability in BGA solder joints is not necessarily untrue. I am familiar ...
PoP Assembly Options
Consider Option 3 for high volumeprocesses - Place all components in normal SMT, including the bottom package.Then place the top ...
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.

Insert Your Email Address

Sponsor
AIM Solder
Viscosity Does Not Equal Rheology: What Solder Paste Measurements Really Tell You
Viscosity is a useful solder paste quality control measurement, but rheology provides a more complete understanding of how paste will roll, fill, release, recover, and remain stable during stencil printing.
AIM Solder
TLPS is proven for outstanding reliabiility #2