A substrate includes: a base; and a plurality of bonding terminals arranged on at least one surface of the base, wherein the plurality of bonding terminals include a first bonding terminal and a second bonding terminal, the first bonding terminal and the second bonding terminal include, in plan view of the base, a circle contacting portion extending along the circumference of a circle tangent to the first bonding terminal and the second bonding terminal, all of the plurality of bonding terminals are arranged so as not to protrude from an area including the circle and the inside thereof, and the circle contacting portion includes at least a first circle contacting portion disposed in the first bonding terminal and a second circle contacting portion disposed in the second bonding terminal.