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Report: Major PWB Production in Hands of Few
MONTREAL — HannStar and Gold Circuit Electronics dominate the global laptop PCB market, taking a 75% share, while the rest is divvied among Unimicron, Compeq and Unitech. Moreover, the threshold for entry is very high, which keeps new players on the sidelines.

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Cadence Pulls Mentor Bid
SAN JOSE -- Cadence Design Systems today pulled its bid to acquire Mentor Graphics, and in doing so offered up some harsh words for its competitor. The EDA firm's board instead authorized a $500 million increase to the company's stock repurchase program.

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August 2008 Issue

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Design News
Sectional Design Standard for Flex
EMA Introduces Single User Access to Digi-Key
Wise Software Releases V15.2 VisualCAM and GerbTool
DesignAdvance Systems Releases New Cross-Probing Technology
PCB Reverse Engineering Firm Opens in UK
Stilwell Baker Opens New Design Center
Valor Customized Software Solutions
PCB Designers, Engineers Invited to Compete
National Instruments' Q2 Sales Up 17%
Altium Offering Amnesty, Discounts to Chinese Pirates

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Fab News
CIMTEK Appoints Professional Services Director
Cimtek Adds Bonham to Management
EPA Plans NY Superfund Site Cleanup
Patent Infringement Case Against Nan Ya Rejected by Court
DDi Virginia Receives AS9100 Certification
ESI Ships 250th Model 5330 Laser Microvia Drill
Foxconn Reports July Revenue up 35% YoY
Camtek Q2 Sales Up
Gold Circuits Expanding Production of Low-Cost Notebook PCBs
HannStar Board Sales of PCBs for Notebooks Rebounds

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Market News
TI VP to Keynote Medical Electronics Symposium
AEA Q2 Lobbying Tab: $256K
German Electronics Union to Seek Higher Wages
MacDermid Forms New Solar Cell Business Unit
Handset Production Up in China, Over 30% for Domestic Use
iSuppli Launches Electronics Supply Chain Training Center
Draft for Energy-Using Products to be Sent to EU
Gartner: Electronics Headed for Widespread Slowdown’
WSTS: Global Chip Market up 12.2% in June
Singapore Growth Slows

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PCB UPdate
PCB UPdate (circulation 20,000) is a daily e-newsletter published by UP Media Group. PCB UPdate provides the latest industry news via a convenient daily e-mail. Subscribe now or check out today's e-newsletter.
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Stilwell Baker Design Center – Flexible solutions to your PCB design needs.
From a simple prototype evaluation board to a multi-gigabit application to high volume consumer electronics applications; providing solutions to your PCB design needs is our goal. Your board can be designed using PCB123 to produce a design that seamlessly fits into the PCB123 ordering and manufacturing process. If you need a specific EDA tool, our Design Center is equipped with Mentor Expedition, Mentor PADS and Cadence Allegro, running on state-of-the-art workstations in a secure, fully backed-up network environment.

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Sysacom R&D Plus - A leader in FPGA and PCB design. Professional, cost effective and fast service. We use PADS, PCAD, ALLEGRO and PROTEL for PCB design. Sysacom R&D Plus

Barrett & Associates Engineering - a contract engineering firm specializing in embedded systems development, circuit design, circuit layout, software and firmware. Their Principal Engineer, Patrick H. Barrett, PE, has worked with Sunstone (formerly ECD) on numerous projects and is experienced with all phases of product design and development, including SMT, Thru-Hole, DFM and DFT.

For a good choice for your next project try: Barrett & Assoc. Engineering

Custom Micro Engineering - PCB Design from your hand drawing, OrCAD (STD) or Protel. You supply the mechanical dimensions for components on board. Prices: $100. -$400. (2-sided) $200. - $800. (4-layer) based on square inch measurement. Delivery within 48-100 hrs. (allow 2 weeks for 4-layer).

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Electronics Forums Search Results
784 results found for "solder mask".
Showing matching items 301 - 350

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77% Bar Coding - auto print and apply solutions - 3/20/07 - blnorman

Bar Coding - auto print and apply solutions We use preprinted labels and laser coding. For PCB we laser mark with CO2 (NdYAG for the aluminum heat spreaders). Laser is a much higher capital investment, but doesn't have nearly the headaches associated with PCB labels.

77% Solder flow Ni/Au - 3/5/07 - Mark

This is 10 layer PCB FR4 with black solder mask. We tested couples of diffrent solder pastes (flux, activation) but not improve. What is the proper thickness of Au layer and Ni?.

77% Scratches on BGA solder resist - 2/27/07 - davef

Scratches on BGA solder resist IPC-A-600G, 2.9 Solder Resist [Solder Mask] [snip]"Solder resists are used to limit and control the application of solder to selected areas of the printed circuit board during assembly soldering operations and are sometimes used to reduce dendritic filament growth[s] between conductive patterns over the printed board's base material surface. Detailed specifications and information regarding solder resist requirements are contained in IPC-6012 and IPC-SM-840."[ ...

77% Peelable Mask - 2/23/07 - josaf

Peelable Mask now we use Solder mask from peters.de but it too thick so we can't use process for screen epoxy

77% Water Absorption of PCB - 2/21/07 - davef

As long as you didn't use excessive reflow temperatures, we'd guess that: * Solder mask blister: Your board fabricator should be able to demonstrate through TMA [or equivalent] analysis that the mask was cured properly. * Delamination: Could be caused by improper preconditioning to remove entrapped moisture. Search the fine SMTnet Archives for recipes to use in removing entrapped moisture.

77% BGA opens - 1/28/07 - Sweet Old Bob

BGA opens Okay you CM haters I don't see anything about the design of the board, other than OSP which is strike one. What is the board size? Where is the BGA located on the board?

77% Copper Finishes versus Layer Thickness - 1/4/07 - Board House

Starting copper on outer layer with . 007 mils pre-pre (1 sheet of 7628) . 007 mils pre-pre (1 sheet of 7628) 1/2 copper foil Thickness after laminating would be .

77% Criteria for thermocouple wire attachment - 12/21/06 - Jack

(1) Thermal mass of component. (2) Proximity of component to components of high thermal mass. (3) Proximity to edge of assembly. (4) PCB pad with big copper layer underneath(Usually, light green solder mask indicates copper layer underneath).

77% BGA rework with unplugged vias PCB - 12/21/06 - ppcbs

BGA rework with unplugged vias PCB The problem with super glue is that is has a cyanide base that turns into a toxic gas and evaporates when heated. Via's should be fully plugged with solder mask at the fab house. If your PCB designers are not up to speed on IPC requirements then you can plug with circuit board slder mask.

77% Criteria for thermocouple wire attachment - 12/20/06 - Jack

(1) Instead of full components on the PCBA (Motherboard), the profile taken from PCBA with few components can be considered accurate. In other words, reflow profile from incomplete PCBA(Some SMT components are not mounted) is the same as reflow profile from PCBA with full complete component mounted. Question: In this case, attach thermocouple wire to the component lead is sufficient to obtain accurate temperature profiling.

77% Wave flux and profiling - 12/18/06 - grantp

Yes, I would hate to resort to cleaning, but the product must be clean. We have been using palettes to keep most of the flux off the PCB, but there is still residue around the connectors. Does anyone suggest a good no clean flux to use with lead free process that leave as little residue as possible?

77% Wave flux and profiling - 12/18/06 - samir

Wave flux and profiling Yikes!! In-line cleaning, to clean cosmetic and benign residues (from a NO-CLEAN) flux... Depending on mask type (glossy, matte, semi-gloss, or semi-matte), will exhibit more or less visible residue.

77% BGA rework with unplugged vias PCB - 12/7/06 - davef

BGA rework with unplugged vias PCB When rushing to get a job done, it's easy to accidently remove solder mask from a nearby via when dressing BGA pads after removing the part. Just hit the via with some super glue [then say a small prayer] and push on. As an alternative, look here: http://www.circuittechctr.com/guides/2-4-3.shtml

77% BGA rework with unplugged vias PCB - 12/7/06 - russ

BGA rework with unplugged vias PCB You have two options 1. Get some real solder mask form board supplier (not touchup pens) and repaint the trace and heat cure. 2. Fill the via with solder before reflowing new part, this usually works but sometimes it doesn't.

77% BGA rework with unplugged vias PCB - 12/7/06 - jimby

BGA rework with unplugged vias PCB We have our circuit board vendor put a solder mask dot over the vias after HASL process. It's a little more expensive but eliminates the problem that you are talking about.

77% Can you wave solder this part - 8/25/06 - davef

Can you wave solder this part We'd do it the same way that you did, except apply no solder mask over the heat slug.

77% Can you wave solder this part - 8/24/06 - davef

Can you wave solder this part Darby National published stencil recommendations for their LGA in the "SMT Assembly Recommendations" section of: http://www.national.com/an/AN/AN-1187.pdf Is it possible that Silicon Laboratories published a similar document for your Cygnal CP2101? Typical QFN-28 Solder Mask" [ Low volume quality PCBs (how to) - 8/15/06 - Board House

Low volume quality PCBs (how to) Bake your solder mask and then solder coat. If you are going to put an immersion finish like Osp, gold, tin or silver you would have to do a Micro etch to clean the copper prior to placing the surface finish. Board House

77% RED EYE - 7/13/06 - johnw

RED EYE Hi all guys what impact does red eye on the epcb have when the solder mask is not uniform to the layer. I am having trouble with quality.

77% Imm Silver and Voiding - 6/28/06 - Gman

Imm Silver and Voiding Good article. Would EDX analysis of the cross-section at the void joints be a good method to determine any plating contamination or solder mask issues?

77% BGA Rework - 4/25/06 - russ

BGA Rework Sometimes you gotta do what you gotta do! We perform this when we cannot get a board to stay free of tacoing, oilcanning, sagging or warping. We utilze solder mask to protect heat sensitive components and remove the PTH stuff.

77% Masking of PWBs prior to conformal coat - 4/19/06 - samir

Masking of PWBs prior to conformal coat Silicone-based coatings "repel" most foreign,non-compatible materials like peelable solder mask, and rubber or vinyl boots. The result is, uncured material around the vicinity of where the boot was. I came up with a masking process that used card-board "boots" and around the perimeter of the mask area, a thicker viscosity silicone coating that would have to be hand applied to gasket and hold the boot down.

77% Board House Pcb Question - 3/17/06 - Board House

Then it turned into No Scrap due to Assembly houses loosing two much time dealing with x-outs. and The feeling was that it was cheeper to have the board house increase the price of the product then to assemble boards with X-outs. For Custormers that allow x-outs we release around 5 -10% overage to the floor to cover manufacturing and any snafu that can happen.

77% Sell Print Circuit Board --(CHINA) - 3/7/06 - Sell Print Circuit Board --(CHINA)

Sell Print Circuit Board --(CHINA) if any question,please send mail to us!!!! Sell Print Circuit Board --(CHINA) Product Name: Printed Circuit BoardPlace of Origin: ChinaFeatures: 1) Surface finish: hot air solder leveling, entice, immersion gold, carbon ink, gold finger, peelable mask 2) Solder mask: photo imageable 3) Profile: routing, punching, V-Cut, chamfered 4) Number of layers for mass production: 2 - 12 5) Min. panel size: 18" x 24" 7) Board thickness: 0.4 - 2.4mm Company Name: ...

77% PB FREE WASH AND MATERIAL HANDLING - 2/27/06 - barryg

PB FREE WASH AND MATERIAL HANDLING we here are setting up our lead free process. 1) Do you physicaly segregate leaded from non-leaded (different storage areas, shelving) for part storage? 2)Do you have a seperate board washer just for lead free?

77% Stencil past height issue - 2/21/06 - Cal Kolokoy

These add height, not to mention HASL plating, because your 0 point is now about a mil or 2 over. Your USL should generally be around 1.5 mils over your foil thickness, so for a 5 mil stencil, 6.5 mils is about right as your target measureent. Lower spec limit should be around 1.5 mils less than your target, so a reading of 5 mils for a 5 mil stencil is still within spec.

77% SMT issues - 2/9/06 - davef

SMT issues If your component meets ANSI/J-STD-002 - Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires, then the problem is at your customer's operation. For instance: * Talk about the distribution [scope and breadth] of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about the board (ie, thickness, type, solder mask, pads coating, pad size, etc) * Describe the component(s) (ie, type, ...

77% Heat guns and component damage - 2/1/06 - Chunks

Heat guns and component damage OK, this is easy. This should show you if the heat gun process is the cause or not. If it's a thru hole relay, use some adhesive such as peelable solder mask or Kapton tape to hole them on.

77% Tented vias on ENIG boards - 1/31/06 - russ

Tented vias on ENIG boards I have never related Solder mask layout to Black Pad. I don't see how they could be related but.......

77% Best contrast for Fiducials - 1/24/06 - Chunks

Best contrast for Fiducials Tell your board house/customers you want "non-smobc". hich stands for non-solder maske over bare copper. MPMs love exposed fids in just about any finish.

77% Wave Pallets - 1/24/06 - Chunks

Wave Pallets Q: If you do not use a selective wave pallet does this not leave the possibility of solder flowing up thru the Via's on the board? Your board house can cover your vias with solder resist. Is it standard practice to run boards thru the wave without a pallet?

77% Peel Mask - 1/17/06 - davef

Peel Mask If you are not washing and want to stay with a peelable mask the two basic types are vinyl and latex. Although we've seen some silicone and urethanes, they cost more. * Do not use latex peelable solder mask with a low residue soldeing process without extensive testing.

77% Solder Paste Evaluation - 1/11/06 - davef

Evaluating Solder Paste ?Not An Option Contributed by Phil Zarrow of ITM an Independent SMT consulting firm With soldering being the dominant source of assembly defects and solder paste being the key component of the process, how come a majority of SMT assembly facilities have no idea how they began using the solder paste that they do. While a few assemblers perform comprehensive solder paste evaluations, the vast majority of users either don抰 know how Solder paste testing should be ...

77% Solder Paste Evaluation - 1/11/06 - davef

Evaluating Solder Paste ?Not An Option Contributed by Phil Zarrow of ITM an Independent SMT consulting firm With soldering being the dominant source of assembly defects and solder paste being the key component of the process, how come a majority of SMT assembly facilities have no idea how they began using the solder paste that they do. While a few assemblers perform comprehensive solder paste evaluations, the vast majority of users either don抰 know how Solder paste testing should be ...

77% Immersion white tin wave soldering problem - 12/16/05 - jax

Immersion white tin wave soldering problem What you are most likely dealing with: Insufficient Pure Sn layer ( multiple causes ) Because elevated temperatures accelerate the diffusion process, the thickness of the Pure Sn layer will reduce during every thermal cycle... ( bakeing PCBs, SMT Reflow, etc... ) Normally reduces the Pure Sn thickness by 0.1-0.15 microns per cycle Min. Use Chip Wave ( Turbulent ) to increase hole fill Increase Wave contact time and depth in solder to increase hole ...

77% Fine Pitch Stencil Design - 12/9/05 - rlackey Cad Software
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