12 connector stress results

ECSS-Q-ST-70-18C

| https://www.eptac.com/wp-content/uploads/2015/03/ecss_q_st_70_18c-space-product-assurance-rf-coax-cables.pdf

 angle cable‐end connector.  3. flange‐mount male receptacle, either two‐ or four‐hole type.  c. The  use  of  right  angle  cable‐end  connector  shall  be  restricted  to  applications where stress‐free mounting of cables with these captive nut

& SnPb Comparison1 9 Flex Crack • Fillet shape and height are similar • Types of cracks exhibited are typical of flexure fractures in ceramic capacitors 10 Where Does It Happen? •  Flexing (Mechanical Stress

| https://www.eptac.com/wp-content/uploads/2014/09/eptac_09_17_14.pdf

Brittle Fracture Testing | Nordson DAGE

ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/test-types/brittle-fracture-testing?con=t&page=6

presence of micro cracks and surface defects such as scratches and chips. In these materials, the high level of stress at the tip of a crack cannot be relieved by plastic flow and so even very small defects can lead to low failure loads

ASYMTEK Products | Nordson Electronics Solutions

Cold Bump Pull | Nordson DAGE

ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/test-types/cold-bump-pull?con=t&page=8

.  The jaws grip the solder ball without damaging the bonding area and applies a load that is virtually symmetrical to the area of attach, therefore applies a more uniform stress field to the ball

ASYMTEK Products | Nordson Electronics Solutions

: – Width and Thickness –  Spacing –  Imperfections – Nick and pinholes –  SMT land – Wire bond pads –  Edge connector lands – Dewetting/nonwetting –  Final finish 14

| https://www.eptac.com/wp-content/uploads/2015/02/eptac_03_18_15-1.pdf

Surface Mount International

Surface Mount Technology Association (SMTA) | https://www.smta.org/icsr/speaker_forms/Paper-Format-Requirements.doc

. For instance, what is the impact of reworking a SAC305/405 assembled connector using an alternate Pb-free alloy? Is changing the Pb-free alloy used within the primary attach process to match the PTH rework alloy the right solution

Surface Mount Technology Association (SMTA)

. •  On the data sheet of the connector, it indicates Gold Flash Overall for contact plating. –  Nowhere does the data sheet document the gold thickness

| https://www.eptac.com/wp-content/uploads/2016/04/eptac_04_20_16.pdf

SolderTips | EPTAC

| https://www.eptac.com/solder-tips/

. Using lead free solder, we are wicking the solder out with braid, but what is happening is that the pins are getting overheated and coming loose from the connector

Journal of SMT Articles

Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm

J. Turbini Abstract 26-2 Solder Alloy Creep Constants for Use in Thermal Stress Analysis Robert Darveaux, Ph.D. and Corey Reichman Abstract 26-2 A Nano Silver Replacement for High Lead Solders in Semiconductor Junctions Keith Sweatman, Tetsuro

Surface Mount Technology Association (SMTA)

The Last Will And Testament of the BGA Void

Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/last-will-of-bga-void.pdf

. One school of industry thought held that a void in a solder joint would be a stress riser that initiated cracks, leading to solder joint failure

Heller Industries Inc.