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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