UBS is downgrading Rubicon Technology (RBCN -8%), whose sapphire wafers are used to make LED...

|About: Rubicon Technology, Inc. (RBCN)|By:, SA News Editor

UBS is downgrading Rubicon Technology (RBCN -8%), whose sapphire wafers are used to make LED chips, following a Q3 report that featured very weak Q4 guidance. UBS is worried about a slower-than-expected ramp of Rubicon's 6" wafers, which carry much higher prices than its smaller wafers. (earlier)