1. A light emitting device manufacturing method comprising:
a preparing step of preparing a light emitting device wafer having a sapphire substrate and a light emitting layer formed on the front side of said sapphire substrate, said light emitting layer having a plurality of first division lines intermittently extending in a first direction, a plurality of second division lines intermittently extending in a second direction, and a plurality of third division lines intermittently extending in a third direction to thereby partition a plurality of regular hexagonal light emitting device areas arranged like a honeycomb;
a holding step of holding said light emitting device wafer by using holding means in the condition where the back side of said sapphire substrate is exposed;
a first laser processing step of performing laser processing along said first division lines, said laser processing having the step of applying a laser beam having a transmission wavelength to said sapphire substrate from the back side of said sapphire substrate in the condition where the focal point of said laser beam is set in said sapphire substrate to thereby form a plurality of modified layers in said sapphire substrate;
a second laser processing step of performing said laser processing along said second division lines;
a third laser processing step of performing said laser processing along said third division lines; and
a dividing step of applying an external force to said first division lines, said second division lines, and said third division lines of said light emitting device wafer to thereby break said light emitting device wafer along all of said first, second, and third division lines, thus dividing said light emitting device wafer into a plurality of light emitting devices.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A light line generating assembly comprising:
a first housing including:
a self-leveling pendulum assembly including a pendulum pendulously suspended within the first housing, and
a first light source coupled to the pendulum, the first light source operable to generate a light beam in a first beam direction, wherein the light beam forms a light line on a surface; and
a second housing coupled to the first housing,
wherein the first housing is capable of moving in a first rotary direction, in which the first housing rotates within a first plane including the second housing, and in a second rotary direction, in which the first housing rotates in a second plane generally transverse to the first plane.
2. The light line generating assembly of claim 1, wherein the light source comprises a laser assembly including a laser diode, a collimating lens, and a line lens.
3. The light line generating assembly of claim 1, further comprising a lock mechanism operable to secure the pendulum and prevent its motion.
4. The light line generating assembly of claim 1, wherein the pendulum assembly further comprises a damping mechanism.
5. The light line generating assembly of claim 1, wherein the first housing further includes a second light source configured to generate a second light beam in a second beam direction.
6. The light line generating assembly of claim 5, wherein the first light beam intersects the second light beam at an angle of approximately 90\xb0.
7. The light line generating assembly of claim 5, wherein the second light source is coupled to a self-leveling pendulum assembly.
8. The light beam generating assembly of claim 1, wherein movement of the first housing in the first rotary direction alters the position of the light line generated on the work surface.
9. The light line generating assembly of claim 1, wherein the first housing is capable of rotating approximately 45\xb0 in the first rotary direction.
10. The light line generating assembly of claim 9, wherein the first housing is capable of rotating approximately 180\xb0 in the second rotary direction.
11. The light line generating assembly of claim 1, wherein the first housing comprises a generally C-shaped structure including:
a curved body having a first end and a second end defining an opening; and
an opened channel defined by the body extending transverse to the first plane including the first housing and the second housing.
12. The light line generating assembly of claim 11, wherein:
the first housing further includes a second light source adapted to generate a second light beam in a second beam direction; and
the first light beam and the second light beam intersect at a point within the channel.
13. The light line generating assembly of claim 1 further comprising an attachment device configured to connect the assembly to the work surface.
14. A method of generating a light line on a work surface comprising:
(a) providing a light line generating assembly comprising:
a first housing including a first light source operable to generate a light beam in a first beam direction, wherein the beam of light is capable of forming a light line on a work surface, and wherein the first light source is coupled to a self-leveling pendulum assembly including a pendulum pendulously suspended within the housing; and
a second housing coupled to the first housing,
wherein in the first housing is capable of rotating within a first plane generally parallel to the work surface and in a second plane generally transverse to the work surface;
(b) engaging the work surface with the light line generating assembly;
(c) generating a light line on the work surface; and
(d) rotating the first housing within the first plane to reposition the light line on the work surface.
15. The method of claim 14, further comprising (e) rotating the first housing within the second plane to reposition the light line on the work surface.
16. The method of claim 14, wherein:
(c) comprises (c.1) generating a light line on the work surface such that it travels in a generally vertical direction; and
(d) comprises (d.1) rotating the first housing along the first plane to reposition the light line offset from vertical.
17. The method of claim 14, wherein the first housing further includes second light source configured to generate a second light beam in a second beam direction.
18. A self-leveling, light line generating assembly comprising:
a first housing; and
a second housing comprising:
a pendulum assembly including a pendulum pendulously suspended in second the housing:
a first light source coupled to the pendulum and configured to generate a light beam in a first beam direction,
a second light source coupled to the pendulum and configured to generate a light beam in a second beam direction, and
a lock mechanism operable to prevent the motion of the pendulum within the second housing,
wherein the first housing is coupled to the second housing such that the second housing moves in both a first rotary direction, in which the second housing rotates within a first plane including the first housing, and a second rotary direction, in which the second housing rotates within a second plane generally transverse to the first plane.
19. A light line generating device comprising:
a first housing including a light source operable to generate a light beam in a beam direction, wherein the beam of light is capable of forming a light line on a surface;
a second housing coupled to the first housing; and
a generally vertical axis extending through the first housing and second housing,
wherein in the first housing is capable of moving in a first rotary direction, in which the first housing rotates about the generally vertical axis, and in a second rotary direction, in which the first housing rotates about an axis generally perpendicular to the vertical axis,
and wherein the first housing comprises a generally elongated slot, and the second housing comprises a post slidably captured within the elongated slot to permit movement along the second rotary direction.
20. The light line generating assembly of claim 19, wherein the first housing is capable of rotating approximately 45\xb0 in the first rotary direction and rotating approximately 180\xb0 in the second rotary direction.
21. The light line generating device of claim 19, wherein:
the first housing includes a pendulum pendulously suspended within the first housing; and
the light source is coupled to the pendulum.
22. A method of generating a light line on a surface comprising:
(a) providing a light line generating device comprising:
a first housing including a light source operable to generate a light beam, wherein the beam of light is capable of forming a light line, and wherein the light source is coupled to a pendulum pendulously suspended within the first housing, and
a second housing coupled to the first housing;
(b) orienting the first housing on a generally vertical work surface;
(c) orienting the light line on the work surface in a first substantially horizontal direction; and
(d) reorienting the first housing to reposition the light line from the first generally horizontal direction to a second substantially horizontal direction,
wherein the first horizontal direction is generally opposed to the second horizontal direction.
23. The method of claim 22, wherein step (d) comprises (d.1) rotating the first housing to reposition the light line from the first generally horizontal direction to the second generally horizontal direction.
24. A light line generating assembly comprising:
a light source housing including a light source operable to generate a light beam capable of forming a light line on a surface, wherein the light source housing comprises a generally C-shaped structure including:
a curved body having a first end and a second end defining an opening, and
an open channel extending along an axis oriented generally transverse to the first plane; and
a base housing coupled to the first housing,
wherein the light source housing is capable of moving in a first direction, in which the light source housing rotates within a first plane including the base housing, and in a second direction, in which the light source housing rotates within a second plane oriented generally transverse to the first plane.