Netscape Communications Corp announced yesterday the resignation of chief technology officer Eric Hahn. Hahn joined the company with the acquisition of Collabra Software Inc in 1995, of which he was the founder. The former Lotus Development Corp executive has left to form his own start-up. Netscape officials said Hahn wanted to spend more time with his family and that there was no bad feeling between him and the company. He will not be replaced. Instead, the corporate-wide CTO’s responsibilities will be broken up and handed to individual CTOs for each product division. Hahn was appointed to the position last October. His move apparently had nothing to do with Netscape’s restructuring earlier this year.