Light sensor module comprising a plurality of elements in a close-tiled arrangement

摘要

A light sensor module 1 comprises a plurality of light sensing elements 2 such as avalache photodiodes arranged on a substrate 4. The elements cooperate in use to produce a combined output signal indicative of an overall level of light falling on the elements 2. Each element 2 comprises a light input surface 16 arranged to face away from the substrate 4 and an opposed surface 18 arranged to face towards the substrate 4. Each element 2 is arranged to make electrical connection 8 to the substrate 4 through the opposed surface 18 leaving the sides 19 of the element 2 substantially free. This enables adjacent elements 2 to sit closely together to form a close-tiled arrangement of the elements 2 covering a large area. Each element may comprise silicon photo multiplier circuitry and may be flip-chip bonded to the substrate.