SMT Component Shifting

Question: We have a problem with chip components shifting during the reflow process, which is being detected during automatic optical inspection. The shifting is not limited to a single component, but rather changes daily, where the component shifting occurs and moves from one location to another very randomly.

SolderTips: How Long Should it Take to Create a Solder Joint

Question: Are you aware of any time studies or standards that have been developed to determine the amount of time it should take to create a solder joint while hand soldering, either a through-hole, or surface mount component?

SolderTips: Problems With Stress Cracks in Ceramic Components

Question: We are having a problem with ceramic SMT components (CAPS) showing stress patterns and cracking after thermal testing. Have you ever seen this and if so, what is allowed or acceptable according to IPC standards, even with the lack of verified electrical failure of these components?

SolderTips: Dealing with the Problems of Soldering Iron Tips Breaking Down

Question: We are having a problem with soldering tips oxidizing and becoming unusable after a few hours use. We are using a lead-free organic rosin core solder and apply additional liquid rosin flux when soldering fine pitch components. We are running the soldering irons between 750 and 800 F.

SolderTips: Defining Shear Forces for Surface Mounted Components

Question: Is there an IPC or other specification that exists explaining the minimum shear force requirements for surface mounted components?

SolderTip #49: Calibration of Soldering Irons

Question: We have both steady output temperature and temperature variable soldering irons. There has

SolderTip #48: The Cleanliness of Wire and Terminal Connections

Question:  What are the specifics on wire and terminal connection cleanliness requirements and how

SolderTip #47: How Long Does it Take to Make A Solder Joint?

Question:  I have heard so many conflicting answers as to how many seconds it

SolderTip #46: Open Connections Found on BGA Components

Question:  We have been stumped by occasional opens at the corner balls of some

SolderTip #45: Manual Soldering vs Wave Soldering

Question:  We assemble simple through hole circuit boards. What are the main factors to