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Spin Coating in Semiconductor Wafer Process

Posted by Anny Zhang on Wednesday, September 19, 2012

这段时间在和一家半导体公司在合作wafer process的相关项目。

这家公司一直在测试Indium的wafer flux晶圆助焊剂。刚开始时,这家公司用Spin Coating这个全自动的流程来上助焊剂。Spin Coating和手工喷涂助焊剂相比,只要机器参数设置好了,
可以连续准确定量的dispense助焊剂,适用于规模量产。 但是Spin Coating 参数的设置,就比较讲究了,因为这可以直接影响到wafer reflow之后的效果如何。

对于很多wafer晶圆厂来说,Cu pillar bump shape(回流和清洗后Cu pillar的形状)是关注点之一,要形成平滑的,没有被氧化的bump shape, wafer flux的选择和Spin coating的工艺流程就很重要了。

在Spin coating中,最需要做到的是让整个wafer表面均匀的涂上足够的wafer flux,而Spin coating的设置参数设置是否合理,起到关键作用。比如说转速RPM是多少,nozzle喷嘴的加速度,喷嘴移动的位置,喷嘴开放时间的长短,spin时间的长短等,都相互相连的有影响。

我自己也在了解和学习过程中。如果你有任何建议或是心得,欢迎分享! 谢谢。
 

Cheers!
 

Picture: Indium Corp

Leave a Comment »

Blogging Success

Posted by Jim Hisert on Friday, August 31, 2012

When I began blogging for Indium Corporation, I was unsure what value I could really add for our readers. Sure I could discuss technical topics, but what hasn’t been explained yet?

It’s been over 5 years now, and I still see the effects of blogging in unexpected places. Aside from calls and emails from readers (which I enjoy), a while back I found a paper from Duke University that used an image created for this blog to explain spin coating. That was the point where it really hit me, that some of this content is being used to help readers. That is a really good feeling!

Recently I have been working with a reader who commented on a blog post, asking for some technical advice. It is an interesting application, he is modding and overclocking desktop and laptop computers. It’s great to see the excitement of individuals learning more about the technology that is available, and discovering ways to improve the products that are available on the market today.

All in all, blogging has been a total success so far. It has helped me learn as much as I have used it to teach, and I have had a chance to meet some really cool people because of blogging. If you’re reading this, feel free to send me an email – even if it is just to say "hello". I am grateful to have readers like you!

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The Art of Spin Coating

Posted by Jim Hisert on Tuesday, January 20, 2009

Here’s another amazing image from Michael Riddle, using Cyber Technologies metrology equipment and software.  The particular flux pictured here has quite a prominent edge bead, which is pronounced in this artistic rendering.

Leave a Comment »

Semiconductor Packaging Materials - Find What You're Looking For

Posted by Jim Hisert on Wednesday, December 10, 2008

 

  • Are you looking for information on semiconductor packaging materials?  Send your request to jhisert@indium.com.  It’s all fair game – released, experimental, or competitor materials.  Flux characteristics, paste properties, application methods…

     

    Inquire about any of the following topics:

    • Pin transfer
    • Package-on-Package (PoP)
    • Solder spheres
    • Glass transition temperatures (Tg)
    • Flip chip assembly
    • BGA rework
    • Cross-sectioning electronic components
    • Paste for component dipping
    • Solder alloys
    • Liquid fluxes
    • Wafer bumping
    • Low alpha solder
    • Spin coating
    • Redistribution layers (rdl)
    • Halogen-free
    • Flux viscosity
    • Solder paste viscosity
    • Whatever else you are interested in
Leave a Comment »

Turning the World of Blogging Upside-Down

Posted by Jim Hisert on Wednesday, July 9, 2008

Indium Corporation’s industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation’s Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

  • Flux deposit measurement using non-contact metrology

Two upcoming white papers (currently under development):

  • Wafer Flux Spin-Coating Topography
  • Wafer-Level Flux Printing

Recent hot semiconductor blog topics, including:

  • Semiconductor assembly materials
  • Future trends in first- and second-level assembly
  • Halogen-free semiconductor assembly materials
  • Engineered solders in MEMS assembly
  • Thermal interface issues
  • Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indium’s blogs can be seen at www.indium.com/blogs

Leave a Comment »

Meet the Bloggers!

Posted by Paul Socha on Tuesday, July 8, 2008

 

Indium Corporations industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

  • Flux deposit measurement using non-contact metrology

 

Two upcoming white papers (currently under development):

  • Wafer Flux Spin-Coating Topography
  • Wafer-Level Flux Printing

 

Recent hot semiconductor blog topics, including:

  • Semiconductor assembly materials
  • Future trends in first- and second-level assembly
  • Halogen-free semiconductor assembly materials
  • Engineered solders in MEMS assembly
  • Thermal interface issues
  • Solar device assembly

 

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indiums blogs can be seen at www.indium.com/blogs

Leave a Comment »

Meet My Fellow Indium Bloggers at Semicon West

Posted by Dr. Ron Lasky on Tuesday, July 8, 2008

Folks,

Indium Corporation's industry leading semiconductor bloggers are hosting a
Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's
Semicon West  exhibit, booth #7834,
from 2-3pm PST.

The technology experts will lead discussions on topics including:

*  Flux deposit measurement using non-contact metrology
*  Two upcoming white papers (currently under development):
*  Wafer Flux Spin-Coating Topography
*  Wafer-Level Flux Printing 

Recent hot semiconductor blog topics, including:

*    Semiconductor assembly materials
*    Future trends in first- and second-level assembly
*    Halogen-free semiconductor assembly materials
*    Engineered solders in MEMS assembly
*    Thermal interface issues
*    Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha , Fez Sayed, Dr.
Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks
will be served, too!

Indium's blogs can be seen at www.indium.com/blogs

Stop by and see them if you are at the show!

Cheers,
Dr. Ron
Leave a Comment »

Meet the Bloggers

Posted by Indium Author on Tuesday, July 8, 2008

 

Indium Corporations industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

  • Flux deposit measurement using non-contact metrology

 Two upcoming white papers (currently under development):

  • Wafer Flux Spin-Coating Topography
  • Wafer-Level Flux Printing

 Recent hot semiconductor blog topics, including:

  • Semiconductor assembly materials
  • Future trends in first- and second-level assembly
  • Halogen-free semiconductor assembly materials
  • Engineered solders in MEMS assembly
  • Thermal interface issues
  • Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indiums blogs can be seen at www.indium.com/blogs.

Leave a Comment »

Meet the Bloggers!

Posted by Tim Jensen on Tuesday, July 8, 2008

Indium Corporation's industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

·Flux deposit measurement using non-contact metrology
·Two upcoming white papers (currently under development):
Wafer Flux Spin-Coating Topography
Wafer-Level Flux Printing
·Recent hot semiconductor blog topics, including:
Semiconductor assembly materials
Future trends in first- and second-level assembly
Halogen-free semiconductor assembly materials
Engineered solders in MEMS assembly
Thermal interface issues
Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indium's blogs can be seen at www.indium.com/blogs

Leave a Comment »

Meet the Bloggers

Posted by Amanda Hartnett on Tuesday, July 8, 2008

Indium Corporations industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium CorporationҒs Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

נ Flux deposit measurement using non-contact metrology

נ Two upcoming white papers (currently under development):

    • Wafer Flux Spin-Coating Topography
    • Wafer-Level Flux Printing

נ Recent hot semiconductor blog topics, including:

    • Semiconductor assembly materials
    • Future trends in first- and second-level assembly
    • Halogen-free semiconductor assembly materials
    • Engineered solders in MEMS assembly
    • Thermal interface issues
    • Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indiums blogs can be seen at www.indium.com/blogs

Leave a Comment »

Indium公司"博客见面会"

Posted by Anny Zhang on Tuesday, July 8, 2008
Indium Bloggers

Indium Bloggers

Indium Corporations industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

  • Flux deposit measurement using non-contact metrology

Two upcoming white papers (currently under development):

  • Wafer Flux Spin-Coating Topography
  • Wafer-Level Flux Printing

Recent hot semiconductor blog topics, including:

  • Semiconductor assembly materials
  • Future trends in first- and second-level assembly
  • Halogen-free semiconductor assembly materials
  • Engineered solders in MEMS assembly
  • Thermal interface issues
  • Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indiums blogs can be seen at www.indium.com/blogs

Pic: Rick Short with the Indium Corp.
Leave a Comment »

MEET THE BLOGGERS event announced

Posted by Rick Short on Monday, July 7, 2008
Indium Corporation offers 9 blogs from 12 bloggers.

Indium Corporation offers 9 blogs from 12 bloggers.

Indium Corporation's industry leading semiconductor bloggers are hosting a Meet the Bloggers session on Tuesday, July 15, 2008 at Indium Corporation's Semicon West exhibit, booth #7834, from 2-3pm PST.

The technology experts will lead discussions on topics including:

  • Flux deposit measurement using non-contact metrology
  • Two upcoming white papers (currently under development):
    • Wafer Flux Spin-Coating Topography
    • Wafer-Level Flux Printing
  • Recent hot semiconductor blog topics, including:
    • Semiconductor assembly materials
    • Future trends in first- and second-level assembly
    • Halogen-free semiconductor assembly materials
    • Engineered solders in MEMS assembly
    • Thermal interface issues
    • Solar device assembly

Indium personnel who will be discussing these topics include Jim Hisert, Paul Socha, Fez Sayed, Dr. Andy Mackie, and Rick Short.

All attendees are welcome to participate in, or observe, the session. Snacks will be served, too!

Indium's blogs can be seen at www.indium.com/blogs

Leave a Comment »

One Way To Write A Technical Article

Posted by Jim Hisert on Friday, June 27, 2008

Writing an article is the hardest part of writing an article.  It must have been said before, but actually sitting down and capturing what has been physically done and mentally learned is tougher for most people than doing all the testing.  I like to clear away all the other distractions, get a humungous soda, and after thinking about the results all day – just write down all my thoughts.  First I go through the introduction and test procedure, then include what I learned from the trials.  After the words are in place, I look for a way to illustrate my point through images, graphs, and charts.  I'll try to get away from the document at this point and clear my mind.  When I come back to writing, the conclusion is usually obvious.

 

After the skeleton draft is in place I leave it for about a week, and then come back to it and look at it like it is someone else's article.  I fill in the blanks, take out the redundant statements, and send it off for further editing.  Right now I'm in the meditation and 'humungous soda' stage, preparing to draw up an article on non-contact measurement and wafer spin coating fluxes.

Leave a Comment »

Dynamics of Liquid Wafer Fluxes

Posted by Jim Hisert on Tuesday, June 17, 2008
Profile of a wafer with flux applied.

Profile of a wafer with flux applied.

Last week, Michael Riddle (Cyber Technologies) and I experimented with liquid fluxes for spin coating / wafer bump reformation.  We used a Cyberscan Vantage to examine the topography of the flux at different spin rates and times.  The interesting findings will be explained in our upcoming article (placement to be determined).

Leave a Comment »

Cleaning Spin Coating Flux

Posted by Jim Hisert on Monday, June 9, 2008

 

I just wanted to take a second and mention my affection for water soluble fluxes they make my life easier! If you've ever used a spin coat machine (spinner) to apply a polymer or flux on a wafer, you know it makes quite a mess. The whole theory behind spin coating is to fling excess liquid off the wafer (and consequently onto the inside of the machine). Being able to simply use a water bottle and a wet paper towel to clean the machine is a lot more desirable to me than using a solvent like alcohol. Who wants to smell IPA?
Leave a Comment »

Spin Coating for Beginners

Posted by Jim Hisert on Friday, May 23, 2008
Step 1, Liquid flux is deposited onto the center of the wafer

Step 1, Liquid flux is deposited onto the center of the wafer

Step 2, A low rpm initial spin pulls flux from the center across the wafer surface

Step 2, A low rpm initial spin pulls flux from the center across the wafer surface

Step 3, A high rpm spin ejects excess flux - leaving a thin layer on the wafer

Step 3, A high rpm spin ejects excess flux - leaving a thin layer on the wafer

Spin coating is an amazingly simple way to apply flux to a (generally round) substrate.  Most commonly used in wafer processing, spin coating can be used as a more uniform alternative to spraying liquid fluxes onto wafers for electroplated bump formation.  Here is an image tutorial to introduce the process:

Leave a Comment »

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