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June 2010 Vol. 2, Iss. 32

 

Dear Subscriber:

In this newsletter we outline some of the challenges in two difficult rework areas: POP devices and PCBs with large thermal masses. In the POP rework section we discuss POP rework challenges. The other article discusses some of the rework challenges of PCBs with large thermal masses.

We invite you to attend an overview of the IPCA610 REV E changes via a webtorial. Over lunch time one of our master instructors will guide you through the major changes instituted in REV E. A nominal fee of $75.00 (compared to the IPC rate of $495.00) gives you a copy of the slides as well as a copy of the IPCA610 differences document. Take advantage of this session to ask your questions.  You can buy the REV E document here.

Training materials for REV E for both the IPCA610 and the JSTD-001 Rev E is due out near the end of the summer.

Wishing you a great summer!
Bob Wettermann
President, BEST Inc

CktBdAnimated

 


POP Rework

As handheld device manufacturers squeeze more in to less space, the POP package has become more and more used in a variety of devices. In many cases there is a combination of both memory and processor power in a single stack.
Reworking such devices is a challenge as there are issues associated with:

  • Part warpage
  • Inspecting numerous layers with "standard" xray equipment
  • Small process window as the rework on any one layer may impact other layers

See our upcoming full article or call Laura Ripoli at (847) 797-9250 if you have a project requiring this type of rework.

 
High Thermal Mass Rework-Thick Boards with Through Hole Connections

One of the ongoing lead free rework chalenges users face is the rework of high thermal mass PCBs.

When removing through hole parts from these high thermal mass boards, solder fountains are often employed in order to get a connector, high voltage capacitor or other large through hole part removed. These high tin content solder fountains tend to quickly erode the copper from the PTHs of the printed circuit board. The tin readily and easily solubilizes the copper-especially at the elevated pot temperatures found in lead free alloys.

By carefully controlling the dwell time of the board in the solder fountain, careful pre-heating of the PCB and other tricks this type of rework can be done with compromising the reliability of the interconnections.
Call Laura Ripoli at (847) 797-9250 if you have a project requiring this type of expertise.

 
Dell Streak-Tablet Light or Super Smart Phone?
                                         
  
New BEST Logo
  

Little was known about Dell's 5-inch MID, that was until a video of the device popped up last month. The device has been released in the UK and should be released by AT&T the US within 2010. It runs on the  Google Android 2.0 OS.

The device has a 5-megapixel camera and has an 800 x 480 capacitive touchscreen. Other features include Bluetooth, 3g and Wi-Fi. Dell has outsourced the production of the small MID to Chinese manufacturer, Qisda.

The Dell MID comes with a 1,300mAh battery, so it should offer more than enough power for your everyday tasks. The Dell Streak does not have much hardware showing on the outside however; there are three touch-sensitive buttons on the right-hand side of the device. On the bottom edge of the device is a multifunction dock connector, as well as the camera on the rear of the device. Dell thought of adding a front facing camera as well, this will be ideal for video conference calls.

Will it give the IPAD a run for this space?

 
TABLE OF CONTENTS
 
POP Rework
High Thermal Mass PCBs
Dell "Streak"
 
QUICK LINKS
 
 
Microsectioning Services

Pad Repair
BGA Reballing Preforms
Underfilled Device Rework
 
 
SIGN UP for the IPCA610 Rev E Webtorial
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SIGN UP for a 45 minute webtorial which will walk you through the most significant practical differences between the IPCA-610 D and the new E version.

DATES: June 23, 30
              July 21, 28
              August 11, 25

Time:11AM-12PM EST,
         12PM-  1PM CST

Cost: ONLY $75.00
   (IPC Cost $495 + Travel)

Registration
:
Call Katy Radcliff at (847) 797-9250 or This email address is being protected from spambots. You need JavaScript enabled to view it..
 
Schedule the New BEST Mobile Training Center
BEST Mobile Training Center
Featuring a richer training experience as students are "sequestered" inside of a training environment, all of the training tools and materials come along with the BEST professional, practical instruction. Call
Katy Radcliff (847) 797-9250 to schedule.
 
VOCAB- Word of the Month
Vocab

ethereal
"ih-THEER-ee-uhl" which is an adjective

The vocabulary you use tells others your level of intellect.

Definition/s:
Light, airy, or tenuous,
Extremely delicate or refined,
Heavenly or celestial,
Pertaining to the upper regions of space.

Usage: "The 1997 reissue of Beach Boys' Pet Sounds included a disc of 11 songs with all instrumentation stripped out, leaving only those terminally sunny, ethereal vocal lines behind"

SOLDERING TIPS

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Newsletter

WHAT'S NEW?

ARTICLE: Multiple Methods for Applying Paste Flux or Solder Paste for BGA Rework

ARTICLE: IPC-A-620 Gets a Facelift

 

 

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