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Understanding and Setting Up Reflow Profiles

Reflowing assemblies using solder paste is the heart of the SMT process. To have the correct profile assures components, boards, and solder joints are not damaged and reliable solder connection is a result.

It is very important to learn about various types of reflow profiles. The traditional profiles are being replaced in instances with new types. Profiles are essential for establishing and maintaining processes. With new types of products changes to reflow profiles may be required as well as for new types of solder such as lead-free.

In this online course you learn all about the terminology, types of profiles, basic types of ovens, measurements and how to setup and take the profiles, and the problems you will see on boards if the profile is not optimum or drifts and starts causing problems. How to purchase. You can start this web-based course today!

Key Objectives Taught in the Course

The content of this course is the same as Module 5 of the Introduction to SMT Assembly course curriculum.

State what reflow means.
State the different ways heat can be generated.
State what infrared is.
State what infrared reflow is.
State the equation for heat transfer for infrared heat.
State what is new about infrared systems.
State the advantages for infrared reflow.
Describe forced convection reflow.
State what oven zones are.
State the equation for convection reflow heat transfer.
State the advantages and disadvantages for convection reflow.
Describe a vapor phase reflow system.
State the advantages and disadvantages for vapor phase reflow.
Describe conductive heating.
State the advantages and disadvantages for conductive reflow.
State how boards are transported through a reflow system.
Describe what bottom heating is and what it does.
Describe what topside heating is and what it does.
State what the parts of a reflow profile are.
State what the preheat zone is.
State what the soak zone is and what it does.
State what the reflow zone is and what it does.
State what the peak temperature should be.
State what the cooldown zone is and what it does.
Describe a RTR profile.
State the advantages to a RSR profile over a RTR profile.
State what effect conveyor speed has on the profile.
State what a thermal profile is.
State when thermal profiles are to be run.
State where reflow profiles come from.
State what profile control limits are.
State what the profile control limit values are.
State what effect board spacing has on a profile.
State the defects caused by reflow profile problems.
State how solder balls are created by reflow profiles.
State what wetting is and how to fix it.
State what deficient solder is and how profiles cause them.
State what tombstoning is and how profiles cause them.
State what voids are and how profiles cause them.
Describe dull and grainy solder connections and how profiles cause them.
State what causes cracked capacitors during reflow.
State what prevents wetting to leads during reflow.
State what charred residue is and how profiles cause it.
State how board density affects profiles.
State what effects packages have on profiles.
State what the options are for running profiles.
List the steps for manual profiling.
Describe what a thermocouple is.
State where to place thermocouples.
State how to attach thermocouples.
Describe how a manual profiler works.
Describe internal profile systems.
State what effect nitrogen has on reflow.
State what documentation is needed for reflow profiles.
Summarize what was learned in the reflow profile course.

You may want to check out the multi-user course license solutions we offer to corporations and universities that need to train 100 or more people.

Target Audience

The course is suitable for a general audience but will have special applicability to manufacturing engineers, product engineers, and production/assembly personnel.

Course Prerequisites

There is no prerequisite for this course.

Average Curriculum Length

2.0 hours

Testing

Includes both pre-testing and post testing.

Online Content Index

Available

Begin Course

After your order is processed by the course administrator, you will receive an email which will contain your username, password and detailed information on how to begin your web-based course. You will be able to start the course(s) you have selected the same day you place your order.

Certificate of Completion

Certificate of Completion will be supplied upon request after you have completed the online course.

Author and Subject Matter Expert: James C. Blankenhorn, President and Chief Executive Officer

Mr. Blankenhorn is the founder and president of TechEdge Online. His experience includes 33 years in electronics, 10 years in semiconductor design and management for TI, Motorola and Honeywell. He has 20 years in managing start-ups including Test International, AWI and SMT Plus. He held the position of VP for Jabil Circuit during a period of rapid growth from $100M to $400M. Mr Blankenhorn holds a Bachelor of Science in Electrical Engineering degree from Arizona State University and is a founding member of the SMTA organization. He has authored over 20 books on SMT and related technologies. He is a featured speaker at many conferences and seminars.

System Requirements

High speed Internet Connection (DSL, cable, ISDN 128)
Browser: Explorer 4.01 Service Pack 2 (or greater), or Netscape 4.7 (or greater). Explorer 5 is recommended
Flash 4 or greater plug-in
16 bit colour, 800 x 600 resolution (minimum requirement)
Audio card (optional)
200 megahertz minimum, 300 megahertz recommended
32 RAM minimum, 64 RAM recommended
50 mb of available disk cache space

Refund Policy

If this material does not meet your expectations as outlined in the course description, you have 3 working days from the date of registration to obtain a 100% refund of the course fee. Please contact us if you have any further questions regarding this guarantee.

Multi-User Online Course License

As a solution for large volume users of this course we offer several plans that may be of interest to you. These solutions are designed for corporations and universities. A minimum number of students is required to make these solutions cost effective.

Sub-Domain:

Making access and use of courses fast and easy is paramount. By having us setup a sub-domain it makes it very easy to get your training program underway. When a company needs to train 100 or more people for a curriculum we offer to setup a sub-domain on our server at no extra charge. The advantages to this offer are numerous. We do the work and will even setup the student files so the student simply logs onto the Internet, uses an assigned UserID and Password and has the content available for learning or reference use right at their fingertips. Students may log in and out whenever they want. Access is based on a term, with 1 year the norm. Each student file is kept confidential.

Another key advantage is with the sub-domain we make available to the client the ability to edit the courses they have licensed. They may opt to remove certain content or add new content themselves from their computer as html, pdf, or swf files. The edit course software is fast and easy to use with no programming skills required. By customizing the course the content can be made to fit your company's exact needs. If you need an extra hand we are available to assist.

Corporate Server:

The fastest access of content is over a corporate Intranet. It also could be you would like to add content that you feel is proprietary and want the highest level of security possible, then licensing courses and software to run on your corporate server makes a lot of sense. Each course may be licensed or purchased, as well we offer licenses for our edit course feature within our TechEdge Web-Based engine for corporate users to edit licensed courses and to develop new ones yourself using programs like Microsoft Word, PowerPoint, or Flash. It is simple, fast and easy.

Here's the typical server requirement for a 50 concurrent user hosted connection:

NT 4/2000 Server
500mhz p2/p3/amd athlon
256 RAM (512 recommended)
IIS, PWS or compatable web server software
SQL or Access 2000 ODBC compliant database driver
Coldfusion Aplication Server 4.0 or higher [ click here ] for more info on coldfusion

Course Development:

There are many who would like to put content up on the Internet or on Corporate Intranets but either do not have the knowledge or the time to do it. To help we can offer onsite training, tools, and experience on how to do it in conjunction with licensing our software and courses. If you have a need for a course to be developed we also have that capability, demonstrated by the quality of the courses you see we offer, which are all made by our staff.

More Information:

If you are interested in any of the above multi-user solutions for this course, please contact us for more information and a quotation. You will be pleasantly surprised at how affordable these multi-user solutions really are!