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AutoCAD Designer
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Engineering & Manufacturing > Contract Manufacturing

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Job Description

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  • Posted: Tue, Dec 20, 2011
  • Time Left: Closed
  • Location: San Jose, United States
  • Client prefers freelancers from:
    San Jose, United States

    You are still able to submit a proposal for this job.

    The client prefers freelancers from
    a different location.

    You're still able to submit a proposal for this job, regardless of your location.
  • Start: Immediately
  • Hourly Rate: $30 - $40 / hr
  • Hrs/wk: Not Sure | Duration: 1-3 months
  • Work View™ Payment Protection
  • U.S. freelancers must have W9
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Introduction

Promex (  [obscured]  -ind.com) seeks a skilled AutoCAD designer to develop a series of drawings to support additional configurations of QFNs (Quad Flatpack No leads).

Promex has a process for building a variety of two types of QFNs; overmolded QFNs that have a semiconductor device in them and Open Cavity QFNs that do not.

Overview of QFN Configurations

QFNs are generally built in mm increment sizes such as; 2 mm x 2 mm; 3 mm x 3 mm, 4 mm x 4 mm, …..10 mm x 10 mm, and 12 mm x 12 mm. QFNs are generally not made in sizes larger than 12 mm x 12 mm. They are often built in non-square sizes (3 mm x 4 mm for example), in fractional sizes (2.5 mm x 2.5 mm, for example) or with leads on only 2 sides vs 4 when they are referred to as DFNs (Dual Flatpack No leads).

The standard lead spacings are 0.4 mm; 0.5 mm; 0.65 mm and 0.8 mm. Odd lead spacing are not common but deleting a lead or attaching a lead to a central ground pad is common.

The leadframes to be designed are c...

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Job ID: 27685638
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