Semiconductor device and method of manufacturing the same
View Patent ↗The invention is directed to providing a smaller semiconductor device having a light emitting element with a low manufacturing cost and a method of manufacturing the same. An adhesive layer 9 and conductive pastes 10 a, 10 b are selectively applied to a front surface of a semiconductor substrate 6 . Then, a light emitting element (a LED die 4 ) is formed on the semiconductor substrate 6 . A P type semiconductor layer 3 is connected to the conductive paste 10 a , and an N type semiconductor layer 2 is connected to the conductive paste 10 b . The LED die 4 is thus electrically connected to pad electrodes 8 a, 8 b through the conductive pastes 10 a, 10 b . Then, a protection layer 12 having openings in the positions corresponding to the pad electrodes 8 a, 8 b is formed on the semiconductor substrate 6 . Electrode connection layers 13 and conductive terminals 14 are then formed on the pad electrodes 8 a, 8 b, 8 c in the openings. The protection layer 12 , the semiconductor substrate 6 and so on are then cut along a predetermined dicing line DL and separated into individual dies.
1. A semiconductor device comprising:
a first substrate;
a second substrate;
a first pad electrode and a second pad electrode that are formed on a front surface of the first substrate;
a light emitting element comprising a region of a first conductive type and a region of a second conductive type and formed on a front surface of the second substrate;
an adhesive layer attaching the light emitting element to the first substrate;
a first conductive member disposed between the light emitting element and the first substrate and electrically connecting the region of the first conductive type and the first pad electrode; and
a second conductive member disposed between the light emitting element and the first substrate and electrically connecting the region of the second conductive type and the second pad electrode.
2. A semiconductor device comprising:
a first substrate;
a second substrate;
a first pad electrode and a second pad electrode that are formed on a front surface of the first substrate;
a light emitting element comprising a region of a first conductive type and a region of a second conductive type and formed on a front surface of the second substrate;
an adhesive layer attaching the light emitting element to the first substrate;
a first conductive member disposed on the first pad electrode so as to be electrically connected to the region of the first conductive type; and
a second conductive member disposed on the second pad electrode so as to be electrically connected to the region of the second conductive type.
3. The semiconductor device of claim 2 , wherein the first conductive member or the second conductive member comprises a bonding wire.
4. The semiconductor device of claim 1 , wherein the first conductive member or the second conductive member comprises a conductive paste.
5. The semiconductor device of claim 2 , further comprising a protection layer disposed on the front surface of the first substrate so as to cover the light emitting element and a back surface of the second substrate, and conductive terminal disposed in an opening formed in the protection layer so as to be electrically connected to the first or second pad electrode.
6. The semiconductor device of claim 2 , further comprising another device element formed on the front surface of the first substrate.
7. The semiconductor device of claim 6 , wherein the another device element comprises a light receiving element that converts light emitted from the light emitting element into an electric signal, the semiconductor device further comprising a protection layer covering the light receiving element and the light emitting element.