Electronics Forum: flex cracks (Page 1 of 6)

Alternate Solders/methods of flex attachment to pcb's

Electronics Forum | Tue Mar 21 19:34:32 EST 2006 | Tom Smykowski

Omar: I dealt with this so called "hot bar" process also, and you're right; it's neither reliable nor repeatable. The goal was to attach a flex LCD display to another flex circuit. The flex LCD was constructed of resin and conductive silver particl

cracks between electrical conductive adhesive and round the edge of the Chip-leds

Electronics Forum | Tue Aug 15 07:02:13 EDT 2000 | George Verboven

We are assembling SMD-Leds (Chip LED cl-220yg-c-ts)on flex foil with Electrical conductive glue (Matthey A1401). When we investigated these foils we found cracks between the conductive adhesive and round the edge of the Chip-leds. This cracks cause f

Cracked Capacitors - Analysis

Electronics Forum | Wed May 22 10:27:42 EDT 2019 | Matt

thanks again for the feedback were your cracks mostly visible in relation to images shown in the document here: https://www.digikey.ca/en/pdf/t/tdk/guide-flex-cracking-mlcc most of our cracking has been lengthwise across the body which from what i

Cracked Capacitors - Analysis

Electronics Forum | Wed May 22 11:40:46 EDT 2019 | emeto

We mostly observed the flex cracks which were not visible.

Cracked Capacitors - Analysis

Electronics Forum | Fri May 17 07:38:30 EDT 2019 | stephendo

If it happened after a high energy event then maybe the root cause is a lack of TVS diodes in the design of the circuit. Or if they are ceramic diodes then maybe they are too close to the edge and have flex cracks.

Cracks on ceramic capacitors.

Electronics Forum | Mon Jun 30 10:52:36 EDT 2003 | Bob

Suggest you ask vendor for a failure analysis. Ceramic chips have specific signatures for mechanical or thermal shock cracking. The vast majority of failures are due to mechanical flex. Depanelization and secondary operations such as hand insertion

Cracked Capacitors

Electronics Forum | Fri Sep 09 07:55:08 EDT 2005 | davef

This pattern indicates flex cracking due to excessive bending of the board or fixture after soldering. Ceramic is strong in compression, but weak in tension. When bending causes damaged parts, look at: * Board flexes, ceramic is strong in compressio

capacitor leakage

Electronics Forum | Wed Jul 10 18:19:42 EDT 2002 | davef

Flex cracking under the terminations is generally regarded as one of the primary causes of failure of ceramic chips. If you can see cracks in the solder joints from board flex, those chips are certainly strongly suspect, and you must assume there is

Ceramic capacitors cracking

Electronics Forum | Wed Feb 05 09:11:05 EST 2003 | davef

Here is some talk about MLC capacitor flex cracking...what happens with depanelizing: http://www.kemet.com/KEMET/web/homepage/kechome.nsf/vapubfiles/f2106/$file/f2106.pdf Here are some other files on breaking capacitors: http://www.avxcorp.com/doc

Resonator Cracking

Electronics Forum | Fri Nov 16 03:23:15 EST 2007 | jwsmt

I'm requesting assistance in developing detection and containment methods for an issue with an SMD ceramic resonator (Murata CSTCE-G-A family). The returns have external visual cracks that originate at the termination and run at approximately a 45 d

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