Читать книгу Design for Excellence in Electronics Manufacturing - Cheryl Tulkoff - Страница 49

Automated design analysis tools represent the latest frontier in reliability analysis and modeling. One example is the ANSYS‐DfR Sherlock automated design analysis software. It is a reliability physics‐based electronics design software that provides fast and accurate life predictions for electronic hardware at the component, board, and system levels in early design stages. Sherlock allows designers to simulate real‐world conditions and accurately model PCBs and assemblies to predict solder fatigue due to thermal, mechanical, and shock and vibration conditions. Approximately 73% of product development costs are spent on the test‐fail‐fix‐repeat cycle. Sherlock design software provides fast and accurate reliability predictions in the earliest design stages tailored to specific materials, components, dies, printed circuit board (PCB)/ball grid array (BGA) stackups, and use conditions. With libraries containing over one million parts, Sherlock reduces FEA modeling time and provides insights before prototyping, eliminating test failures and design flaws, while accelerating product qualification and the introduction of groundbreaking technologies. During preprocessing, Sherlock automatically translates ECAD and MCAE data into 3D finite element models in minutes. In post‐processing, Sherlock automates thermal derating and democratizes the thermal and mechanical analysis of electronics.

Sherlock seamlessly integrates with already existing simulation workflows in the hardware design process. It is most valuable when implemented in the early design stages, such as:

 Initial parts selection

 Initial parts placement

 Selecting the final bill of material

 Final layout

 Design for manufacturing

Sherlock makes ANSYS SIwave, ANSYS Icepak, and ANSYS Mechanical users more efficient. It directly connects simulation to material and manufacturing costs.

Additionally, Sherlock's locked IP model protects intellectual property in the supply chain. With the locked IP model, designs are transferred back and forth between design suppliers and design users while preserving PCB design details; the intended use of the PCB design will not be disclosed via environmental conditions or reliability requirements. This communication tool enables two entities to work together on a system with a layer of trust built into the reliability calculations. Sherlock simplifies and improves reliability prediction using a unique, three‐phase process consisting of data input, analysis, and reporting and recommendations.

Assessment options include:

 Thermal cycling

 Solder joint fatigue

 PTH fatigue

 Mechanical shock

 Natural frequency

 Harmonic vibration

 Random vibration

 Bending

 Integrated circuit/semiconductor wear‐out

 Thermal derating

 Failure rate analysis

 Conductive anodic filament (CAF) qualification

 High‐fidelity PCB modeling

Sherlock provides actionable recommendations and presents results in comprehensive, professional reports suitable for internal and external distribution.