San Jose-based Sage Inc., which designs and markets semiconductors used in flat-panel displays, said Tuesday that it will seek to raise as much as $34.5 million in an initial stock sale. . . . Bermuda-based Global Crossing Ltd., which is building a worldwide fiber-optic network, said it will be added to the Nasdaq 100 index, made up of that market's biggest non-financial companies, on Sept. 9.