Advanced Micro Devices (AMD) - Get Report was down 5.8% in midafternoon as bad news from TriQuint (TQNT) dragged the chipmakers lower.

Intel

(INTC) - Get Report

was down 1.6%,

Micron

(MU) - Get Report

was down 2.9% and

Texas Instruments

(TXN) - Get Report

was down 4%. The

Semiconductor Index

(SOX)

was down 1.6%.

TriQuint's profit warning comes on top of Tuesday's report from

Semiconductor Equipment and Materials International

indicating that the slowdown in equipment orders in April was worse than had been anticipated.