San Jose-based Fujitsu America Inc., a subsidiary...

San Jose-based Fujitsu America Inc., a subsidiary of Fujitsu Ltd. of Japan, has announced the $9.5-million purchase of a 120-acre parcel in Hillsboro, Ore., to build a 150,000-square-foot computer disk-drive manufacturing plant that eventually will employ 400 people.

Construction of the $25-million plant is scheduled to begin in April or May and could be completed within a year. Production of 10 1/2-inch disk drives could begin by late 1986, officials said.

Last month, Fujitsu Microelectronics Inc., also a Fujitsu Ltd. subsidiary, bought a 200-acre Gresham, Ore., factory site for $9 million. That site will house a semiconductor plant that eventually will employ more than 1,000 workers, officials said.

Fujitsu Ltd. has been an outspoken critic of California’s unitary tax, which requires a multinational corporation to pay taxes based on worldwide operations rather than on business done just within the state.

San Francisco-based McKesson Corp., a major distributor of drug and health care products, has announced that it will launch an employee stock ownership plan (ESOP) and will initially contribute 500,000 shares of stock to the program. The stock currently is valued at $19 million.

Under the ESOP, the 500,000 shares will be contributed to individual employee accounts over the next 10 years. The company says 8,800 of its 13,000 employees will be eligible to participate.

“This program is an extension of our efforts to increase employee ownership of McKesson, representing yet another way for us to link our employees’ personal goals with those of the company’s stockholders, with the objective of increasing employee interest and involvement in improving our productivity, quality of service and profitabilty,� chairman and chief executive of McKesson, Neil E. Harlan, said in a statement.

Micom Systems Inc., based in the Simi Valley, has agreed to acquire Interlan Inc. of Westford, Mass., for 1.75 million shares of Micom stock. The deal, subject to various conditions, also requires that Micom’s stock price be at least $27 a share for a specified period.

Both firms are involved in the so-called Local Area Network business, which permits high-speed data transmission within or between computer systems.

Microcomputer Memories Inc., Van Nuys, a manufacturer of 3 1/2-inch hard disk drives, has received two contracts with a total value of $5.4 million. The firm said its backlog of sales contracts now stands at $35 million.