USA As Represented by Secretary of the Navy

Gerald E McWilliams

Arthur R Clawson

Wing Y Lum

An improved method of liquid phase epitaxial growth of III-V compound on an nP substrate by growing the epitaxial layer in an atmosphere of H.sub.2 with 10.sup.-5 to 10.sup.-4 mole fraction PH.sub.3.

Method of liquid phase epitaxial growth

A device for determining the state of charge in batteries. The battery un test is discharged to its maximum capability by controlling the discharge current in a linear manner. The product of the current and battery voltage is recorded until the battery power reaches maximum at the maximum power point. The readings, peak power and the potential of the battery at the peak power, are held on meters by peak read and hold and track and hold circuits, respectively. From the readings obtained the state of charge can be determined by using a calibration curve for the type of battery being tested.

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San Diego, CA, United States of America

Gerald E McWilliams