Vishay CRCW2512220RJNEG Thick Film Chip Resistors

Gideon Analytical Laboratories received four Vishay CRCW2512220RJNEG thick film chip resistors to be analyzed. Thick film resistors are the most used resistors in electrical and electronic devices. The resistive material is a special paste with a mixture of a binder, a carrier, and the metal oxides to be deposited. These Vishay CRCW2512220RJNEG resistors thick film chip resistors feature stability at different environmental conditions and 2mm pitch packaging option for 0603 sizes. Typical applications for these chip resistors include automotive, telecommunications, and industrial. Its resistance range is 1 and 10 ohms. All of the Vishay CRCW2512220RJNEG thick film chip resistors tested open. The goal was to try to diagnose these failures.

Electronic failure analysis ensued. All of the resistors had arrived still mounted on the PCBs. On the first sample, the laser scribe mark traversed the alumina about half and in a straight line, so several eruptions were analyzed using SEM-EDS. The top glaze on the first sample was removed, and there was extensive damage under the glass scratch protection. This ended up being the case for all four Vishay CRCW2512220RJNEG thick film chip resistors. We used SEM-EDS analysis on all four samples to determine what the contamination was. For three of the four samples, the presence of chlorides was detected. This issue was related to the manufacturing process.

Another day, another problem solved by Gideon Analytical Laboratories. We have proven methods by which we solve electrical problems. We do the research. We present you all of the gathered evidence and then we make a conclusion. We offer objective, accurate, candid explanations of why electrical problems are happening. Unlike a compromised hermetic seal, we have integrity. Whether your company is large or small; wherever you are in the world, we are the analytical laboratory to choose. If you are having electrical problems, call Gideon Analytical Laboratories today.

Sample 4 SEM-EDS, once again, chlorides present

Sample 4 SEM-EDS, once again, chlorides present

SEM-EDS Sample 1

SEM-EDS Sample 1

SEM Sample 1, spots were analyzed

SEM Sample 1, spots were analyzed

Sample 1, noticeable damage

Sample 1, noticeable damage

Sample 1, top glaze removed

Sample 1, top glaze removed

Laser scribe mark traverses the alumina

Laser scribe mark traverses the alumina

Sample 2, new resistor

Sample 2, new resistor

Sample 3

Sample 3

Sample 3 no adhesion loss or delamination, but noticeable damage

Sample 3 no adhesion loss or delamination, but noticeable damage

Sample 3 SEM micrograph

Sample 3 SEM micrograph

Sample 3 SEM-EDS, Chlorides present

Sample 3 SEM-EDS, Chlorides present

Sample 4, micrograph of another spot of contamination

Sample 4, micrograph of another spot of contamination

Sample 3 SEM-EDS, another spot, chlorides present again

Sample 3 SEM-EDS, another spot, chlorides present again

Sample 4 micrograph of contamination

Sample 4 micrograph of contamination