Design Mechanical
Resume:
Aaron Palomar
San Diego Ca
abmdk0@r.postjobfree.com
RELEVENT EXPERIENCE
PCB Design: 15+ of experience and expertise in all considerations of PCB
design. RF, High density, Signal integrity, DFM, DFA, Electro-Mechanical,
Impedance calculations, material selection, stackup, panelization,
virtually all documentation associated to PCB Layout, Fabrication, and
Assembly.
RF Design: Design of EMI sensitive devices for wireless Ultra Wide band
Radio, and wireless USB. Considerations for this type of design have been:
EMI Shielding, Transmission lines, such as; RF co-planar wave guide, RF
differential co-planar wave guide, calculations to achieve desired
impedances, connector selection to minimize reflections and db loss such as
end launch versus through hole SMA connectors. Material selection is
critical to this type of design.
Simulation: Extensive use of Hyperlynx to simulate digital signals such as
DDR Ram and SDRAM modules has been successful in preventing design errors
that would otherwise have been overlooked. Pre Layout considerations:
Using Hyperlynx to find what impedance is appropriate, what maximum trace
length can be, and what series and or parallel termination is required.
Post Layout considerations: Again using Hyperlynx to prove or adjust
circuit to maximize performance using the pre-layout considerations. This
has proven to be an excellent tool and I highly recommend it.
Project Management: Organizing system projects, team members, timelines,
and development. Considerations: Organizing time tables for each stage of
project, Vendor communication, Team participant tasks and duties,
organizing weekly status meetings to assure project is progressing and
resolve problems that might delay project completion.
Mechanical Design: Design of sheet metal enclosures, custom brackets,
shielding devices, etc using SolidWorks and AutoCAD tools. Considerations:
Design for manufacturability, electromechanical devices, wireless
shielding enclosures. Parts procurement, vendor organization and
delegation. One very useful skill I have developed over the years is to
use a mechanical tool such as Solidworks to create the board outline, keep-
outs, keep-ins, height restrictions, tooling holes, also parts placement of
critical parts such as Rf, and edge connectors, inter-board connectors,
etc. Defining critical component placement, keep-outs keep-ins, etc. using
mechanical tool to extract an IDF file that can then be imported to PCB
Layout has proven to be invaluable.
CAD TOOLS
PCB Layout: Mentor Expedition 2005-2007.8, Dx Designer, Design Capture,
IO Designer 8.1, Fablink, Drawing Editor, Design Architect,
BoardStation2004-2005, Pads 5.0 to 2009, Cadence Allegro 15.1-16, Specctra
15, Orcad Schematic Capture, Altium Designer 6 to Winter 09, Protel99SE,
Pcad2002-2006
Simulation: Hyperlynx, Ansoft Designer, Ansoft HFSS
Mechanical: Solidworks 2007-10, Circuitworks, Autocad 14 to 2008, AutoCAD
building systems/inventor
CAM: Cam350, CamCad, Camtastic
Office: MS Word, Excel, Front Page, Acrobat, Photoshop, PowerPoint, etc...
WORK EXPERIENCE
PCB Layout Engineer, Simulation, Circuit Design Engineer, Mechanical
Drafter, 7/2006-Present
Independent Consultant
Primary considerations: Design of high speed test equipment primarily for
the military. To include schematic capture, PCB layout, signal integrity
simulation, design for test, and fabrication. Form factors and platforms:
PCI interface, analog to digital design, Rf design, (to 20+ gHZ) LVDS,
impedance controlled signals, isolation of switching power supplies, high
voltage power supplies.
Secondary considerations: Creation of assembly panels and fabrication
documentation using industry standard documentation tools. Tools used and
other points of interest: IO Designer to unravel high density BGA
interfaces and to create symbols. Use of Solidworks to create Sheet metal
shields and solid block shields for Rf enclosures and protection of
sensitive circuits. Tools: Mentor Expedition PCB, FabLink, Drawing Editor,
DxDesigner, Design Capture, IO Designer, Hyperlynx, Solidworks,
Circuitworks, AutoCad, Cadence Allegro, Pads Layout, Pads Logic, Orcad
Capture, Altium Designer, SAP documentation control.
Companies of note:
Aeroflex Wichita, Ks (Military based test equipment)
DST (Digital Safety Technology) Raleigh, NC (Law enforcement imaging
devices)
Pentair Corporation San Diego, Ca (High voltage power supplies)
Broadcom San Diego, Ca (Test boards for high frequency devices)
Probe Science/G4S Justice services Pasadena, Ca (monitoring devices for law
enforcement)
Honeywell (Device for Orion space shuttle)
Rockwell (test devices for high frequency microprocessors)
Spectrum Controls, WA (sensor control circuits and monitoring devices)
Senior layout Engineer/Mechanical designer 9/2004 - 7/2006
Pulse~LINK, Carlsbad, CA
Responsibilities: Management of all PCB, Mechanical, and board simulation
of Ultra Wide Band radio system. Skilled project management while at
Pulse~LINK was essential to system success and timely delivery of product.
Typical management tasks: Organize weekly status meetings, Delegate tasks
to Junior Designers, Solve design issues; communicate with vendors
regularly to assure timely delivery of parts. Submit weekly status updates
to superiors. Much of the design on this multi-board system requires a
thorough knowledge of RF layout practices. A typical board will have 50ohm
co-planar wave guide tr lines, differential co-planar wave guide, etc.. A
notable accomplishment has been circuit simulation. (IBIS and Spice) This
skill has been essential to the success of device. Responsible for die
planning, pinout, and substrate design of 560 pin BGA. Responsible for
mechanical enclosures, custom shielding, and entire system modeling. A key
accomplishment while at his company has been to reduce the size UWB system
to a Mini PCI. Tools: Allegro, Pads Layout, Dx Designer, Orcad Schematic,
Polar calculator, Hyperlynx, Ansoft Designer, Solidworks2006, AutoCad2006,
and CAM350.
Senior PCB/Mechanical Designer 3/2004 - 8/2004 (contractor)
RainBird, San Diego/Tijuana
Manager of Cad department for two locations, Tijuana Mexico and San Diego,
CA. Responsibilities: Organized team for mechanical and electrical
considerations. This typically includes careful planning of PCB to
maintain circuit integrity and flow while meeting enclosure requirements
and functionality. Close attention was required in design process for
manufacturability, and testability because of the high volume. Tools:
Solidworks2004, PCAD, CAM350, Autocad2004.
PCB/Mechanical Designer 6/2000 - 3/2004
Palomar Design, Santa Cruz, CA
Consulting/Contracting company: Palomar Design provided a complete turnkey
solution for a wide range of devices from simple to 10+ GHz Devices
requiring custom shielding, enclosures and brackets. A standard design
process would be as follows: Circuit design, board layout, parts
procurement and part purchase, fabrication, assembly, mechanical enclosures
and shielding. Tools: Board Station, Expedition, DxDesigner, Pads,
Allegro, Hyperlynx, Orcad, Protel, Pcad, Specctra, Autocad, Solidworks,
CAM350, and Polar calculator.
PCB Designer 3/2000 - 6/2001
Idea Logic, San Jose, CA
Design of DUT type PCB's for the HP8300, HP9400, J750, Nextest, etc. Test
heads. The primary function of this type of PCB is to test microchips.
Minimizing cross talk, shielding critical traces, matching trace lengths,
controlling the flow of return current, and controlling impedance are some
considerations for this type of design. These boards ranged from 8 to 30+
layers. Virtually all designs of this type require impedance control. Many
designs require differential pairing with an offset of less than 10 mils.
Some of these designs required a design team of up to four designers of
which I managed. Other notable accomplishments while at Idea Logic were the
creation of custom sockets for the testing of microchips. Tools:
Protel99se, Pads PCB, Power Logic, Orcad Schematic, and Camtastic.
Engineering Technician 4/1996 - 3/2000
Powell Power Electronics, Engineering, Watsonville, CA
Responsibilities: Circuit design and PCB layout of solid-state circuit
breakers. The implementation of these devices are for High current DC
rectifiers. (10,000 amp @ 800 volts) These devices are designed to
monitor current and voltage changes along rail lines such as the BART
system.
EDUCATION
B.A., Engineering 9/1991
Sawyer College, Pomona, Ca, GPA: 3.9 - 9 month course electronics Ca
Certification
C++ 12/2002
UCSC, San Jose, Ca, GPA: 4.0 - UCSC Ext: C Programming & C++ Ca
Introduction
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