Total Dispensing Solutions

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Mark Yanchak, Sr. Manufacturing Engineer,APSCO

APSCO, continued on page 2

APSCO International offers turnkey capabilities for managing theircustomers’ complete manufacturing cycles – from materialsprocurement through product fulfillment. As a medium-to-high-volumecontract manufacturer, APSCO provides partners with a complete

range of engineering and manufacturing services forprinted circuit boards (PCBs). Their innovative manu-facturing processes are designed to meet and exceedcustomer expectations in quality, reliability and delivery.To meet the increasing demands of next-generationelectronic assembly, APSCO recently added anAsymtek Century® SMT dispensing system with aDispenseJet® valve to their Cleveland, Ohiomanufacturing plant. APSCO is pleased with theperformance of the Asymtek system. Here’s why:One particular application required that APSCOdispense three 0.6mm (.02 in.) dots of Loctite 3609adhesive per circuit board on a 35-up panel, a total of105 dots per panel. A Fuji CP IV 3 chip shooter then

placed a 1206 component on one of the dots and two 0603 passivecomponents on the other two dots. Conventional needle dispensing was slowand inefficient when compared to the upstream pin insertion equipment anddownstream chip shooter. Several factors contributed to slower dispensing.Height adjustment for each individual PCB within the panel was necessary dueto board warpage. In addition, the z-axis motion required for needledispensing added unnecessary overhead. Total dispensing time was 95seconds, not including material handling (see Figure 1).

APSCO needed an in-line dispensing process that could keep pace with theother equipment. Asymtek offered the Century® SMT, an in-line fluid dispensingsystem designed to support adhesive dispensing for mid-range SMT (SurfaceMount Technology) lines. The DispenseJet® valve provides unique non-contactjet-dispensing, eliminates board contact and minimizes height sensing.“The same day the Century® SMT system was delivered, we placed it inproduction to see if it could keep up with our high-speed assembly line. As aresult, we were running actual production the first day. No beta testing wasperformed, which surprised a lot of people. The results were excellent right fromthe start,” according to Mark Yanchak, Sr. Manufacturing Engineer for APSCO.Mark quickly wrote a dispensing program using Asymtek’s Fluidmove® forWindows® (FMW) software. FMW offers familiar Windows® features like on-line documentation and context-sensitive help. APSCO was able to optimizeacceleration and velocity without sacrificing accuracy. A dispensing time of27 seconds was easily achieved (see Figure 2), resulting in a nearly threefoldincrease in overall throughput. “It was immediately clear that the

Figure 1

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DispenseJet® Valve ................... 2✦ Centers of Excellence ................... 3✦ New People … New Assignments 4✦ Nepcon West ’99 ......................... 4✦ Dispensing Tip:

Flow Rate Control .................... 5✦ Trade Shows, Conferences,

Seminars and More .................. 6

APSCO, continued from page 1

Century® SMT dispensing system with non-contact jetting contributedto the significant increase in throughput,” said Yanchak.

The DispenseJet® valve overcomes the limitations of needledispensing. Board contact is not required, and dot quality is virtuallyunaffected by board warpage. In addition, Asymtek’s patternrecognition system quickly and accurately locates pre-programmedfiducials even when registration marks are poor.The DispenseJet® and Century® platform are examples of the unionof Nordson/Asymtek technologies. Their combined knowledgeprovides dispensing solutions for a wide range of industries andapplications. For more information about our SMT dispensingsystems and DispenseJet® non-contact technology, contactAsymtek. For more information about high-volume contractmanufacturing, call APSCO at 440-352-8961, or log onto their website at www.apscoinc.com.

Figure 2

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In SMT operations where adhesivesare used to bond components toboards, process engineers driveto reduce cost, improve process flex-ibility and achieve greater through-put. Non-contact jetting technologyarose from the need to dispense ad-hesives faster and more repeatablythan traditional needle dispensingsystems. Non-contact dispensingaddresses the limitations of conven-tional needle dispensing in a com-pletely new way.

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The patented DispenseJet® valvemoves above the board at a uniformheight, jetting dots from a distanceof 1 mm (0.04 in.) to 3.5 mm (0.14in.) from the board. Adhesive is fedinto a chamber where it is heatedand temperature controlled toachieve optimal and consistent vis-cosity. Using a ball and seat design,adhesive fills the void left by the ballas it retracts from the seat. As theball returns, the force due to accel-eration breaks the stream of adhe-sive which is jetted through thenozzle. The broken adhesive streamstrikes the substrate and forms anadhesive dot.The DispenseJet® valve can applymultiple shots of adhesive per dot,providing dot sizes for componentsranging from 0603 to PLCC. Thevalve is capable of cycling every 15milliseconds.

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Non-contact jetting is virtually a“hands-off” process. TheDispenseJet® valve completely elimi-nates the needle and all Z-axis move-ment during the dispense cycle. Inaddition, the valve minimizes adhe-sive stringing and tailing, while provid-ing a much higher tolerance forvariations in PCB flatness. Repeatabil-ity of ±3% makes the DispenseJet®

valve nearly three times as accurateas typical auger valves.

To learn more about how non-contact jetting can improve your SMT manu-facturing process, call us at 1-800-ASYMTEK (279-6835).

ISSUE JET NEEDLE DISPENSERS

Stringing and tailing Minimal/None Significant Problem

Adjustments Needed Once per day Up to 3 times/hour

Needle standoff contacts Eliminated/None Hit pads, leads andtrack through adhesive

Board support adjustments Eliminated/None Set up required for eachboard/part style

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Ball jetsadhesive dot

Spring returnsball to seat

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Material flowsto seat

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Asymtek ➋

Total Dispensing Solutions

A WORLDWIDE REACH…+�����������5��������As a part of company-wide expansion, Asymtek and Nordson have established a network of Centers of Excellence(COE) around the world. These Centers contain applications engineering labs and training centers with state-of-the-art dispensing equipment. The COEs are managed by applications engineers and technicians who provide custom-

ers with local process development support, and offer training both onsiteand at customers’ facilities. “This organization of resources enables us toreach customers in every part of the world within their own time zone,” saidRobert Ciardella, Asymtek President and Vice President, Nordson Electron-ics Systems Group.

Asymtek/Nordson Centers of Excellence are located in the United States(California, Connecticut and Ohio), The Netherlands (Maastricht), Japan(Tokyo), Taiwan (Taipei), Korea (Seoul) and Southeast Asia (Singapore).

Some Centers have a focused specialty in addition to providing electronicsapplication support. For example, the Amherst, Ohio COE specializes influxing, jetting and conformal coating applications, whereas the Carlsbad,California COE concentrates on encapsulation, underfill and surface mountadhesive (SMA) applications. Sophisticated measurement tools, such as adifferential scanning calorimeter (DSC) for measuring cured substrates,are used to optimize customer processes and are available in Amherst

and Carlsbad. Application expertise is shared among the Centers of Excellence to ensure high levels of customersupport throughout the world.

These facilities are just one aspect of a coordinated program to extendcompany services throughout the United States, Europe and Asia. Otherpoints of interest include:

✦ The Maastricht COE, headed by Ton Schless, offers spares anddelivery 24 hours a day, 7 days a week. Service support is providedthrough pager rotation.

✦ The Tokyo COE, managed by Frank Hamano, provides specialengineering and equipment modification to meet individualcustomer requirements.

✦ The Seoul COE, headed by J.H. Koh, has fluxing, coating, conven-tional curing and Millennium® demonstration equipment with qualifiedapplications and service support.

✦ The Taipei COE, managed by Gary Chang, has a complete line ofequipment to support and demonstrate ASPA (Advanced Semicon-ductor Packaging Assembly) applications.

✦ A satellite Center of Excellence in Hong Kong will soon have demon-stration facilities to provide applications support and training.

The Centers of Excellence also create the opportunity to build strongrelationships with research institutes like the Rochester Institute ofTechnology in the U.S., the Fraunhofer Gesellschaft in Europe, and theTai-Ta University in Taiwan, by providing them with local equipmentand support.

For more information about the Center of Excellence near you, contactAsymtek headquarters.

Seoul COE, Choi Myung-Ho and NamSeong-Woo

U.S. COE, l to r, Steve Adamson, RickHorwath, Dru Cursi, Eric Browne, BenjiQuintero, Nancy Baker and Dave Gibson

Maastricht COE, Jacques Mycke(front, center)

Asymtek ➌

Total Dispensing Solutions

!���6�����7!�������$������7���������� �����The Nordson/Asymtek partnershipstrengthens local customer supportin the field and at headquarters.Asymtek’s president, RobertCiardella, has been promotedwithin the Nordson Corporation toVice President, Electronics SystemsGroup (NESG). In this position,Ciardella manages both theAsymtek organization as well asNordson’s Electronics BusinessGroup based in Amherst, Ohio. AlecBabiarz has been promoted to VicePresident of Business Developmentfor NESG while maintaining his keyresponsibilities for marketing andsales at Asymtek.

Asymtek’s U.S. regional offices con-tinue to grow in personnel and capa-bility. Here’s a summary of changesthat result in more focused customer

support:

Lisa Fertsch isnow Asymtek’sRegional Man-ager servingthe Northwestand is theworldwide ac-count managerfor AMD.

Jerry Frost of Nordson is the newRegional Manager for Southern Cali-fornia and Mexico.

KevinBagaline andPaul Gallo,Area SalesManagers,now overseesales, applica-tions and cus-tomerservice. Kevinmanages theCentral and

Southwest territories and Paul, theEast Coast.Their new posi-tions are a partof Asymtek’soverall goalto provideincreased localsupport for cus-tomersthroughout theUnited States.

In addition, Jim Gabrielsen has beenhired in the Central region as FieldService Engineer to provide serviceand applications support and training.

Brett Arnold is the new Applica-tions Lab Manager for NordsonAmherst, where he heads theCenter of Excellence.

Working at Asymtek headquarters,Glen Gibbs, Asia BusinessDevelopment Manager, providesthe necessary communication linkbetween the Asian Centers ofExcellence and Asymtek to ensurethat customer needs on currentand future projects are met. Heworks closely with Asymtek’smanufacturing and engineeringteams to expedite support forcustomers and distributors in Asia.

Roy Ciardella has been promotedto Business Development Managerto manage Asymtek’s relationshipswith other supplier companies. Formany years, Asymtek has valuedstrategic alliances with other mate-rial and equipment suppliers to pro-vide customers with total processsolutions.

For more information regardingsupport in your area, contactAsymtek.Lisa Fertsch

Paul Gallo

Kevin Bagaline

We have lots of exciting things to show you! Stop byour booth #2333 at Nepcon West ’99, in Anaheim CA,February 23-25.Exhibiting along with our parent company, Nordson,we will be showing the latest in dispensing technologyfor the surface mount industry. Newproducts for dispensing surfacemount adhesive, conformal coat-ing, underfill, and encapsulationwill be demonstrated live. We’ll also have several multi-media displays explaining the operation of our most popu-lar pumps and valves, as well as the award-winningDispenseJet® valve.

��������3����'��������#��������$�.�������$�Asymtek and Nordson equipment will be operatingin two lines in the Technology Advancement Center(TAC) and in the booths of several adhesive com-panies throughout the show. In addition, our tech-nical experts will be presenting three papers at the

Nepcon Conference.

If you want to learn more about ourinnovative dispensing systems, logonto our web site (www.asymtek.com)

and keep watching this newsletter for the latestinformation.

Please contact us if you would like a free pass toNepcon West ‘99.

Asymtek ➍

Total Dispensing Solutions

Total Dispensing Solutions

DISPENSING TIP:Flow Rate Control with Rotary Positive Displacement PumpsDetermining the optimum flow rateachievable with needle dispensingcan be challenging. Most processengineers find the correct flowrate through a process of trial anderror. Unfortunately, inaccuraciescan occur while fine-tuning thedispensing equipment, materialand process combinations.

Understanding flow rate manage-ment is key to achieving greaterdispensing accuracy. Proper flowrate control is particularly impor-tant when you dispense materialswith viscosities that change signifi-cantly during a production run.

Flow rate is defined as the rate, inmg/s, at which the fluid comes outof the needle tip. For rotary augerpumps, this depends on severalfactors: valve speed, the dispensetip, fluid temperature in thedispense path, air pressureapplied to the valve, and theviscosity of the material.

When using Asymtek’s DV-06 andDV-6000 Series Rotary PositiveDisplacement Pumps, the followingare recommendations for increas-ing flow rate (in order of priority):

Valve speed – The rate at whichthe auger screw is rotated. Motorspeed can be adjusted to maxi-mize the dispensing consistencyfor each pump design and fluidtype. The speed control has amulti-turn, high-resolution knobthat is easily adjusted and can belocked at the desired setting. Thenumbered speed control knobhelps you document the dispens-ing process for SPC (statisticalprocess control).

Needle dispensing tipGage or inside diameter of thedispense tip – The pressureresistance to flow is inverselyproportional to the dispense tip’sinside diameter raised to thefourth power. Keeping other

settings constant, a smaller tip size (larger gage number) delivers a muchsmaller flow rate.

Dispense tip length – The pressure resistance to flow is proportional to thelength of the tip. For example, a 6.5 mm (0.25 in.) dispense tip will yield ahigher flow rate than an equal gage 13 mm (0.5 in.) dispense tip with othersettings constant.

Tip geometry – A conical dispense tip has the effective inside diameteronly over the last part of the fluid path; therefore, the effective length isminimal. Keeping other settings constant, a conical tip of equal gage givesa higher flow rate. Note: Conical tips are not recommended for use withneedle heating.

The following parameters can improve flow rate, but will have limited benefits:

Fluid temperature in the dispense path – Controlling the temperature atthe needle tip keeps fluid viscosity constant and ensures consistent fluidflow. For best heating results, use a metal needle. Be sure not to raise thetemperature to the point where pot life is affected; follow the formulators’recommendations.

Air pressure on the fluid supplied to the dispenser – Set the air pressureto the lowest value that will ensure adequate material is supplied to thepump. This will minimize variations due to pressure fluctuations.

Viscosity of the fluid – The viscosity of the fluid has bearing on the flow rate.The pressure resistance to flow is proportional to the fluid’s viscosity. Practically,however, fluid viscosity is not a variable that can easily be changed.

The following three-dimensional graph illustrates the relationship betweenvalve speed, needle temperature and flow rate.

Specific curves relative to needle gage have been developed for fixedneedle gage and fluid pressures. Contact Asymtek’s ApplicationEngineering Group for details.

Asymtek ➎

➏ Asymtek Printed on recycled paper

Total Dispensing Solutions

Asymtek®, DispenseJet®, Century®, Millennium® and Fluidmove® are registered trademarks of Asymtek. Windows® is a registered trademark of Microsoft Corp.©1999 Asymtek

North AmericaNorth AmericaNorth AmericaNorth AmericaNorth America✦ SMTA / Pan Pacific, Kauai, HI P

February 2-5, 1999✦ Nepcon West, Anaheim, CA EP

February 22-25, 1999, Booth #2333✦ Borderland, El Paso, TX E

March 16-17, 1999, Nordson Booth #N13✦ Nepcon Philadelphia, Philadelphia, PA E

May 5-6, 1999, Booth #100✦ Chip Scale International, Santa Clara, CA E

May 5-6, 1999✦ Midwest Electronics Expo, Minneapolis, MN E

May 11-12, 1999, Booth #521✦ ECTC, San Diego, CA

June 1-4, 1999✦ Nepcon East, Boston, MA E

June 15-17, 1999, Booth #2754

EuropeEuropeEuropeEuropeEurope✦ Electronik, Stockholm, Sweden E

January 19-22, 1999, LIF Sweden Booth✦ EC-MCM, London, England

February 1-2, 1999, Nordson Booth✦ Industrial Electronics, Utrecht, Netherlands E

March 2-5, 1999, AVT Production Booth✦ ELKOM, Helsinki, Finland

March 3-5, 1999, LIF Elektronika Booth✦ Nepcon Electronics, Birmingham, England E

April 13-15, 1999, Nordson Booth #9430✦ Semicon Europa, Munich, Germany E

April 13-15, 1999, Nordson Booth #B1654✦ Expo Electronica, Moscow, Russia E

April 20-22, 1999, Amtest Booth✦ SMT / ES&S Nuremberg, Germany EP

May 4-6, 1999, Nordson Booth✦ ISHM-UK Microelectronics, N. Yorkshire, England EP

June 7-9, 1999, Nordson Booth #30✦ Electronics Forum, Manchester, England E

June 30-July 1, 1999, Nordson Booth

Asia/PAsia/PAsia/PAsia/PAsia/Pac Rimac Rimac Rimac Rimac Rim✦ Internepcon Japan, Tokyo, Japan E

January 19-22, 1999, Nordson Japan Booth✦ Semicon Korea, Seoul, Korea E

February 23-25, 1999, Nordson Korea Booth✦ Semicon China, Beijing, China EP

March 17-18, 1999, Electronic ScientificEngineering Booth

✦ Electronic Weekly, Seoul, Korea E

March 30–April 1, 1999, Nordson Korea Booth✦ IEMT / IMC Microelectronics, Tokyo, Japan EP

April 21-23, 1999, Nordson Japan Booth✦ Nepcon Shanghai, Shanghai, China E

April 27-30, 1999, Electronic ScientificEngineering Booth #1G02

✦ Semicon Singapore, Sicec, Singapore E

May 4-6, 1999, Asia Radio Booth #005

New Asymtek Video Now ANew Asymtek Video Now ANew Asymtek Video Now ANew Asymtek Video Now ANew Asymtek Video Now Available. Call us for a copyvailable. Call us for a copyvailable. Call us for a copyvailable. Call us for a copyvailable. Call us for a copy.....

✦ DV-6000 Rotary Positive Displacement Pump Tutorial

FY 2000 Compliance:FY 2000 Compliance:FY 2000 Compliance:FY 2000 Compliance:FY 2000 Compliance:Look for Asymtek’s statement of compliance on our website: www.asymtek.com.

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