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FAQ
What specifications does
Corfin process comply with?
I have a trim and form specification;
what do I need to do?
I don't have a trim and form specification;
what do I need to do?
Why should devices be hot solder dipped
after lead preparation?
What are the benefits and advantages of hot
solder dipping versus plating?
My parts are ESD sensitive. How
does Corfin ensure that my parts are protected?
Can Corfin process small lots?
What package types can Corfin process?
Can Corfin provide devices with a Lead
Free finish?
How does Corfin ensure that parts
meet the customer's satisfaction?
After parts are processed, how are the parts
shipped back to the customer?
What kind of tooling does Corfin use to trim,
form, and hot solder dip components?
How do I get a quotation?
What specifications
does Corfin process comply with?
Please see the list of standards including
the TMTI process here.
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I have a trim
and form specification; what do I need to do?
If you already have a trim and form specification
for your device, complete a Customer
Requirements Form and send your trim and form specification
with sample parts to Corfin. Corfin will evaluate your samples
and return them along with a quotation.
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I
don't have a trim and form specification; what do I need to do?
If you don't have a lead preparation specification,
provide Corfin with the mechanical package outline and your PCB
pad layout, if it exists. Corfin will generate a trim and form
specification and submit it for your approval. Once approved,
Corfin will generate a quotation.
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Why should devices be hot solder
dipped after lead preparation?
During the trim and form process, the leads
of the device are clamped and trimmed, resulting in exposed base
material. This results in potential assembly and solderability
problems if the component leads are not hot solder dipped. Corfin
hot solder dips all devices after trim and form. This eliminates
potential assembly problems such as solderability, de-wetting,
non-wetting, and oxidation. Corfin hot solder dips devices using
solders such as Sn63Pb37 or SAC305 which are compatible with the
solder paste used in the PCB assembly process. This provides for
better overall solder joint strength.
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What are the benefits
and advantages of hot solder dipping versus plating?
The hot solder dipping process has the following
benefits:
- The solder finish is more dense
than plating and has at least two years storage shelf life.
- The thicker solder coverage results
in a greater volume of solder which improves toe and heel fillet
in the solder joint and prevents insufficient solder joints.
- The process dissolves any existing
gold lead finish.
- It does not negatively affect the
Nickel barrier layer.
- The specified solder alloy is compatible
with the solder paste used in PCB assembly processes and ensures
a homogeneous, reliable solder joint.
- Eliminates gold embrittlement problems
which may occur after PCB assembly.
Plating of leads is an electrolytic process.
The finish thickness is typically 50-100 microinches, less than
half that of a hot solder finish. Plated leads have a short life
before oxidation of the lead finish starts (typically 30 days)
due to porosity.
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My parts
are ESD-sensitive. How does Corfin ensure that my parts are protected?
Corfin maintains an ESD program to JESD-625.
Our production areas have ESD dissipative tiles connected to ground.
Each production area has separate temperature and humidity monitors
and controls. All personnel wear ESD smocks, heel straps, continuously-monitored
wrist straps, and finger cots. All paperwork is kept in static-safe
travelers unless removed at least 12 inches from unprotected devices.
Corfin has been certified by Military, Space, and Commercial companies
to be < 50 volts ESD potential at the work surface.
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Can Corfin process
small lots?
Corfin processes lot sizes from small, prototype
volumes to high, on-going production volumes: Corfin presently
is processing over 5,000 different package styles. Typically,
for any lot size greater than 100 units, there is no set-up charge.
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What
package types can Corfin process?
Corfin processes thousands of different package
styles, including Flat packs, QFPs, SOICs, SSOPs, TSSOPs, TSOPs,
QSOPs LCCs, PGAs, ASICs, RF Power Transistors, GaAs MMICs, Fiber
Optics, Lasers, SAW Filters, Chip Components, BGA's and J-Lead
Components.
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Can Corfin provide devices with a
Lead-Free finish?
Corfin can flush off existing termination finishes
and replace with SAC305 or other desired alloy:
- The customer specifies the alloy
required.
- The customer can provide the alloy
or Corfin can procure the alloy.
- Corfin has the capability of using
any alloy you require.
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How does
Corfin ensure that parts meet the customer's satisfaction?
Corfin generates a Customer Process Authorization
(CPA) sheet for each process. The CPA specifies the Customer's
exact process, handling, and packaging requirements. The CPA is
reviewed and approved by Corfin's Quality Assurance Manager and
the Customer. It then becomes the controlling process specification.
Corfin also processes a set-up part, which is verified by the
processing engineer and Quality representative, to verify that
the process is within specifications and maintains process and
inspection data on all lots.
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After parts are processed,
how are the parts shipped back to the customer?
After the parts have been processed, Corfin
packages the product in Matrix Trays, Tubes, Bulk, or Tape and
Reel, as required per the Customer Requirements Form. Corfin can
cross-reference your packaging requirements and provide a quotation
for the appropriate package. If off-the-shelf shipping packages
are not available, Corfin can provide custom Matrix Trays, Tubes,
or Carrier Tape.
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What
kind of tooling does Corfin use to trim, form, and hot solder
dip components?
Corfin can trim and form devices using any
of the following:
- Customer-consigned tooling
- Corfin's Universal Tooling
- Universal Tooling is used for processing prototype or small
lot sizes
- Adjustable Tooling
- Dedicated Dies
- Adjustable Tooling and Dedicated Die Sets are used for on-going,
high volume production or for those applications that require
specific lead form geometries.
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How
do I get a quotation?
Call us at 1.603.893.9900. We'll ask you to
do the following:
Complete a Customer Requirements
Form or have us complete one with you over the phone.
Fill out a Component Trim and Form
Specification Sheet.
Forward these, along with sample parts, to Corfin.
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For more information, please click
here to download our Services Brochure.
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