IBM T. J. WATSON RESEARCHCENTER

1101KitchawanRoad,P.O.Box218,YorktownHeights,
NY 10598
September
10,2008
To Whom It May Concern:
This is to certify that Dr. Dong Kam hasworked full time (40 hours/week)as a
Postdoctoral
Researcher
from May 23,2007to August15,2008,andhasbeenworking
full time (40 hours/week)
StaffMembersinceAugust16,2008at the IBM
asa Research
ThomasJ. WatsonResearchCenter,Yorktown Heights,New York, and is still actively
employedin that position.During this period,both Dr. Kam and I havebelongedto the
samedepartment,
andI am currentlyhis manager.
Dr. Kam's researchhasbeenin the areaof signalintegritydesignand analysisfor
high-speedI/O subsystems.
One of the projectshe hasbeenworking on involveslinklevel analysisand optimizationfor high-speedand high-densityon-boardlinks. More
specifically,Dr. Kam investigatedpracticaldistanceand speedlimits for electricaland
opticalmodule-to-module
on-boardlinks includingstate-of-the-art
circuit andpackaging
technologies.Hardware-validated
models of advancedorganic modules and printed
circuit boards were used to explore these limits. Simulation of link performance
performedwith an internallink modelingtool basedon his link model allowedus to
explorethe effect of equalizationand modulationformatsat differentdatarateson link
bit error rate and eye opening.The SystemTechnologyGroup as well as many other
groupsin IBM will benefitfrom this work.
Dr. Kam has also contributedto the standardization
activity of OIF, the only
industrygroupuniting representatives
from dataand optical networkingdisciplines.He
has actively participatedin technical discussionsfor signaling convention,Tx/Rx
equalization,referencechannelmodels,and link-level simulation.He providedtechnical
basis and insightsto the Physicaland Link Layer (PLL) Working Group in OIF, and
playeda pivotal role in establishing
the CEI-25standard.
Dr. Kam is currentlymaking pioneeringcontributionstowardsthe researchof
millimeterwave(-60 GHz) antenna-in-package
development.
As the packageplaysa key
role in the overall systemperformanceand cost,the significantof Dr. Kam's research
cannotbe overemphasized.
Dr. Kam's aforementionedcontributionshave resultedin I joumal paper, 4
conferencepapers,and I BestPaperAward to date.

 Sincerely,

/
BriarfFloyd,Ph/.D.{
Manager,RF & WirelessCircuitsandSystems
IBM T. J. WatsonResearchCenter
1101Kitchawan Rd, Yorktown Heights,NY 10598