1149 smt parts falling off during 2nd side run in reflow oven results

Electronics Forum: smt parts falling off during 2nd side run in reflow oven (4)

Upside Down ROHS

Electronics Forum | Mon Jun 19 18:17:43 EDT 2006 | PWH

We are now running SMT ROHS assemblies. We are losing some upside down parts in the reflow oven when running the 2nd side. These are parts that do not fall off the leaded version. Anybody else having problems with this? What are you doing to stop

Re: REFLOWING 2 SIDED SMT BOARDS

Electronics Forum | Wed Jun 16 15:44:52 EDT 1999 | Jagman

| WOULD LIKE TO DO RELOW OF 2 SIDED SMT BOARDS. USUALLY THE BOTTOM SIDE HAS RESISTORS AND CAPS ONLY. WHEN THE BOTTOM OF THE BOARD HEATS UP, THE PARTS ARE FREE TO MOVE AND ONLY SURFACE TENSION WILL KEEP THE COMPONENT FROM FALLING OFF. | CAN BOARDS BE

Express Newsletter: smt parts falling off during 2nd side run in reflow oven (1140)

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Partner Websites: smt parts falling off during 2nd side run in reflow oven (5)

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parts off during double-sided reflow. Additionally, after eutectic solder is first melted, the alloying that occurs at the sol- der joint during reflow effectively increases the remelting point

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