Mark Jason Custodio

Feasibility and design of SAW and BAW filters on modules for cellular RF systems

Key Skills:

• 14 years of SAW & BAW filter topology experience on different bands from low to ultra high bands, with varying design challenges for small and large signal performance, size & cost.
• Codesigned with the module team, worked on the laminate section for the acoustic area for optimum performance on impedance match, rejection & isolation & heat dissipation.
• Experienced on filter codesign for both Tx (load pull, PAE & ACLR, figure of merits and locus size) and Rx (LNA NF & gain)
• Conducted electromagnetic simulations (HFSS) for loss breakdown and inductor Q improvement and coil sensitivity analysis
• Power durability & harmonics simulations to ensure large-signal specs compliance

Major accomplishments:

• BAW B7, B40, B41 codesigned for HB PAMID module meeting targeted IL and critical rejection specs (critical skirt steepness) while keeping smallest BAW size with best layout practices.
• Lead for BAW n77 & n79 C-Band 5G design experience for both Tx & Rx for a module codesign using non-conventional topologies
• BAW 6GHz n106 Tx & Rx ultrawide design (1.2 GHz BW) in the smallest die dimensions allowed by fab
• 
  

• Liaised with stakeholders to define and document design requirements.
• Brainstormed with product designers to implement and refine new manufacturing processes.
• Addressed design challenges and evaluated alternative design models to meet project requirements.
• Conducted technical evaluations of engineering designs and test results.

Feasibility and design of RF SAW filters and modules for wireless communications

Key skills:

• Achieve desired filter response by selecting appropriate filter design techniques, process and technology nodes
• Module codesign for optimum performance
• Feasibility studies, final design and releasing to mass production of SAW RF filters and modules for wireless communications.
• Running linear and non-linear simulation, EM parasitics evaluation and optimization.

Major Accomplishments:

• SAW filter designs for B39-B41FB, single B41FB released to production for a leading US customer with high-volume orders
• SAW HQTCF B30 design for HB-PAMiD designed and released to production.

• Responsible for the development of radio frequency surface acoustic wave (SAW) filters for mobile phone applications (GSM, W-CDMA and LTE).
• Duties:
• Product definition of filter specifications based from customer requirements.
• Achieve desired filter response by selecting appropriate filter design techniques, process and technology.
• Design win: Filter design with temperature-compensation on a 1GHz band with high a relative bandwidth requirement.
• Filter design in wafer-level packages for modules for a top tier customer.

• Duties:
• Planning and design of continuous improvement process (CIP) for semiconductor equipment to achieve highest performance and increased reliability.
• Provide application support to wafer fabrication customers.
• Support sales team in technical presentations to clients and provide application training.

• Duties:
• IC test load board design for new RF (GSM, EDGE, CDMA, Wi-Fi, Bluetooth) products.
• Build test program (C++ and Cadence), debug and qualification.
• Provided technical support for the production testing of assigned RF products.
• Project design and implementation to achieve product yield improvements, coordinated with both wafer and IC (back- and front-end) testing.
• Major Projects:
• Project: Sample on the Fly (SOTF) on all LTX-tested products thru adaptation of handler-tester communication, tester libraries and test program (C++) to improve output efficiency by conducting simultaneous quality assurance testing with the final testing.