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December 1998

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Subject:
From:
"Stephen R. Gregory" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 16 Dec 1998 13:47:53 EST
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In a message dated 12/16/98 4:18:37 AM Pacific Standard Time, [log in to unmask]
writes:

<< All

 Does anyone out there know of a training group that has some expertise in
 soldering SMT devices using Au80Sn20, a eutectic solder that has a melting
 temperature of 280'C.

 Phil Hinton
 [log in to unmask]>>

Hi Phil,

You might check with Jim Blankenhorn of SMT Plus, he gives onsite training for
rework operators. I'm pretty sure he could tailor his class around high-temp
soldering. I've brough Jim in to conduct training at other places I've worked
at, and he really does an excellent job! (Haven't had him here where I work
now, we're a start-up and ain't quite got the moola for it yet...hehehe) He
will provide soldering stations (Metcals) and every stuff if ya' need him to.
Another thing I like about Jim's training is that he doesn't focus ENTIRELY on
soldering, but goes into other important areas like tip maintenance, cleaning,
inspection, terminology, etc....it's a real well-rounded class.

-Steve Gregory-

Below is the course outline:

Terminology
There are many new terms used in SMT soldering presented in this entry
section. Terms include those pertaining
to boards, vias, traces, solder joints, solder fillets, lands, pads, and many
more. All are shown with detailed
images.

Basics of SMT Soldering
An understanding of soldering is essential to working on today's complex SMT
assemblies. Topics presented
include:

                      Soldering Systems
                      Metals
                      Soldering Action
                      Temperature Effect
                      Thermal Shock
                      Soldering and Desoldering Steps

Solder, Flux and Cleaning
The impact of the type of materials used is presented and includes:

                      Relationship of Solder, Flux and Thermal Energy
                      Material Characteristics
                      Soldering Temperatures
                      Wire Solder /Types
                      Flux and Types
                      Paste Flux
                      Intermixing Fluxes
                      Cleaning Methods
                      Solderwick Sizes and Use

Tip Care and Safety
Tip care and use is critical to keeping tools at their peak performance.
Covered are:

                      Tip Construction
                      Tip Designs
                      Oxidation
                      Cleaning
                      Sponges
                      Tinning
                      Tip Surface Problems
                      ESD and Prevention

Tip Uses, Shapes and Temperatures
When soldering, knowing which is the proper tip, temperature and how to use it
are key to successful soldering.
Topics include:

                      Identifying Tip Temperatures
                      Key Factors in Tip Selection
                      Solder Melt Temperatures
                      Using to High or to Low Tip Temperature
                      Uses for Different Tip Shapes
                      Temperatures for Soldering and Desoldering
                      Cleanup

Component Soldering
There are many leads styles used in SMT and this section teaches you how to
solder each. Topics include:

                      Recognizing Damaged Leads and Repairing Them
                      Polarity or Pin 1 Locations
                      Tack Soldering for each Component Type
                      Soldering Steps and Techniques for Each Lead Style

Component Desoldering
Sometimes it is more challenging to remove components than to solder them. It
is easy to damage components or
boards unless it is done properly. Topics covered for this area are:

                      Component Attachment Methods
                      Tip Preparation Requirements
                      Tip Shapes
                      Techniques
                      Removal Times for a Wide Range of SMT Packages

Inspection and Defects
Everyone who solders must inspect. Topics covered:

                      Workmanship Standard Manuals
                      Factors Affecting Performance
                      Inspection with Magnification
                      Over-Inspecting
                      Prototypes and Production Inspection
                      Solder Defect Categorizing
                      Setting up for Corrective Actions

Hands-On Lab
The second half of the course is a hands-on lab. In this lab each student is
furnished with a Metcal soldering
system and tips. Following step-by-step instruction, the student will solder
and desolder assorted SMT
components including:

                      Chip Components (0805, 1206, 1210)
                      Tantalum Capacitors (C size)
                      Melf's (MLL-34 and MLL-41)
                      SOTs (SOT-23 and SOT 89)
                      SOICs (SOIC-14, SOIC-16, SOLIC-16, SOLIC-20)
                      QFPs (QFP-120)
                      Fine Pitch QFPs (QFP-100, QFP-160, QFP-208)
                      PLCCs (PLCC-44, PLCC-84
                      PLCC SMT Socket (PLCC-68


                  Course Materials: Performing Rework/Repair on SMT/FPR/BGA
                  Instructor: James C. Blankenhorn

Phone: (408) 438-6116 | Fax (408) 438-5450 | 5403-F Scotts Valley Dr. |Scotts
Valley, CA 95066

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