ADE Corporation Added to Russell Microcap Index

ADE Corporation (Nasdaq: ADEX) announces that the
Company has been added to the newly established Russell Microcap(TM)
Index. The Russell Microcap Index is comprised of the smallest 1,000
securities in the Russell 2000(R) Index plus the next 1,000 largest
companies based on total market capitalization. ADE Corporation
continues to be included in the Russell 2000 and Russell 3000(R)
indexes.
   Russell indexes are widely used by investment managers and
institutional investors for index funds and as benchmarks for both
passive and active investment strategies. More than $2.5 trillion in
assets currently are benchmarked to them. Investment managers who
oversee these funds purchase shares of member stocks according to that
company's weighting in the particular index.

   About ADE Corporation

   ADE Corporation is a leading supplier of metrology and inspection
systems required for production in the silicon wafer, semiconductor
device, magnetic data storage and optics manufacturing industries. The
Company's systems analyze and report product quality at critical
manufacturing process steps for yield enhancement, providing quality
certification data that is relied upon by semiconductor wafer, device
and computer disk manufacturers. The Company's systems also are used
for production measurements in the semiconductor chip fabrication
process. To learn more about ADE, visit the Company's Web site at
http://www.ade.com.