Master thesis - How to reduce acoustic noise in Multi-Layer Ceramic Capacitors

MLCCs do not always sit quietly on the board and do their job. Sometimes they get bored and start to sing. (“How to Reduce Acoustic Noise of MLCCs in Power Applications”, Texas Instruments).

Background: 
Unwanted sounds is and increasing problem for electric control units in automotive applications in the driver compartment. The transition from traditional electrolytic capacitors to MLCC’s has accelerated this problem, since the MLCC has piezoelectric properties that needs to be addressed during the design of the PCBA.

Objective: 
To evaluate “known” solutions to verify their efficiency and create and verify guidelines for PCBA design that will allow for the use of ordinary MLCC to be used in any design if followed.

Job description: 
Examine and verify “known solutions” from a mechanical/electrical/acoustic perspective and with gained knowledge propose guidelines for the use of MLCC’s on PCBA designs intended for use in automotive applications in the driver compartment.

Education/program/focus:
Education: Engineering Physics or similar

Number of students: 1
Start date for the thesis work: Q1 2025

Contact persons and supervisors:
Leif Pudas, Senior test engineer, 0700865742, leif.pudas@scania.com
Kristoffer Olofqvist, manager, 0767216182, kristoffer.olofqvist@scania.com

Application:
Your application must include a CV, personal letter and transcript of grades 

A background check might be conducted for this position. We are conducting interviews continuously and may close the recruitment earlier than the date specified.