1. A system for a head of an iron-type golf club, the system comprising:
an iron-type body extending from a shaft-attachment structure, the iron-type body having a front surface and a back surface, the back surface including a raised central portion and a recessed area, the recessed area extending along a back-surface peripheral edge of the iron-type body and extending around the raised central portion; and
a first mass member releasably attached to the back surface of the iron-type body,
wherein the first mass member is positioned within the recessed area and extends along a back-surface peripheral top edge of the iron-type body, and
wherein a back surface of the first mass member is flush with a back surface of the raised central portion.
2. The system of claim 1, wherein the recessed area extends along substantially the entire back-surface peripheral edge of the iron-type body.
3. The system of claim 1, wherein the recessed area completely encircles the raised central portion.
4. The system of claim 1, wherein the first mass member further extends along a back-surface peripheral bottom edge of the iron-type body.
5. The system of claim 1, wherein the first mass member extends along substantially the entire back-surface peripheral top edge of the iron-type body.
6. The system of claim 1, wherein the first mass member extends along substantially the entire back-surface peripheral edge of the iron-type body.
7. The system of claim 1, wherein the first mass member substantially encircles the raised central portion.
8. The system of claim 6, wherein the first mass member is thinner at the top than at the bottom.
9. The system of claim 1, further comprising a ball-striking face member located on the front surface of the iron-type body, the ball-striking face having an average density that is less than an average density of the iron-type body, which is less than an average density of the first mass member.
10. The system of claim 1, further including a second mass member configured for releasable attachment to the back surface of the iron-type body.
11. The system of claim 10, wherein the second mass member has a thickness that differs from a thickness of the first mass member.
12. The system of claim 10, wherein the second mass member has an average density that differs from an average density of the first mass member.
13. The system of claim 10, wherein at least one of the first mass member and the second mass member is configured to extend along substantially the entire back-surface peripheral edge of the iron-type body.
14. The system of claim 10, wherein at least one of the first mass member and the second mass member is configured to substantially encircle the raised central portion.
15. The system of claim 10, wherein at least one of the first mass member and the second mass member is thinner at the top than at the bottom.
16. The system of claim 10, wherein at least one of the first mass member and the second mass member has a constant thickness.
17. The system of claim 10, wherein the first mass member and the second mass member have different shapes.
18. The system of claim 10, wherein at least one the first mass member and the second mass member abuts the raised central portion.
19. The system of claim 10, wherein the first mass member and the second mass member are configured for interchangeable attachment within the recessed area.
20. The system of claim 10, wherein the first mass member and the second mass member are configured for simultaneous attachment within the recessed area.
21. A system for a head of an iron-type golf club, the system comprising:
an iron-type body extending from a shaft-attachment structure, the iron-type body having a front surface and a back surface;
one or more first mass members releasably attached to the back surface of the iron-type body, the one or more first mass members having a first back-surface profile and a first mass distribution; and
one or more second mass members configured for interchangeable attachment with the at least one first mass member, the one or more second mass members having a second back-surface profile different form the first back-surface profile and a second mass distribution different from the first mass distribution.
22. The system of claim 21, wherein the one or more first mass members have a footprint shape and the one or more second mass members have the same footprint shape as the one or more first mass members.
23. The system of claim 21, wherein the one or more first mass members extend adjacent to substantially the entire back-surface peripheral edge of the iron-type body.
24. The system of claim 21, wherein the one or more first mass members form an annular ring and wherein the one or more second mass members form an annular ring.
25. The system of claim 21, wherein the one or more first mass members have a thickness along at least a portion of a top edge of the back-surface peripheral edge that is less than a thickness of the one or more first mass members along a least a portion of a bottom edge of the back-surface peripheral edge.
26. The system of claim 21, wherein the one or more first mass members include an upper first mass member extending along the back-surface peripheral top edge and a lower first mass member extending along the back-surface peripheral bottom edge.
27. The system of claim 26, wherein the upper first mass member has a thickness that is less than a thickness of the lower first mass member.
28. The system of claim 21, wherein the first mass distribution has a higher center of gravity than the second mass distribution.
29. The system of claim 21, wherein the back surface includes an annular recessed area adjacent to the back-surface peripheral edge of the iron-type body and wherein the one or more first mass members are positioned within the recessed area.
30. The system of claim 29, wherein the annular recessed area defines a recessed volume and wherein the one or more first mass members are located entirely within the recessed volume.
31. The system of claim 21, wherein the one or more first mass members includes more than one first mass member.
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. An array substrate for a liquid crystal display device, comprising:
first and second lines on a substrate and spaced apart from each other, the first and second lines formed of a first metallic material;
a gate electrode connected to the first line;
a gate insulating layer on the first and second lines and the gate electrode and including a groove, the groove exposing the substrate and positioned between the first and second lines;
a semiconductor layer on the gate insulating layer and corresponding to the gate electrode;
a data line crossing the first and second lines and on the gate insulating layer;
a source electrode on the semiconductor layer and connected to the data line;
a drain electrode on the semiconductor layer and spaced apart from the source electrode;
a passivation layer on the data line, the source electrode and the drain electrode and including an opening, the opening exposing a portion of the gate insulating layer and an end of the drain electrode; and
a pixel electrode positioned on the gate insulating layer and in the opening, the pixel electrode contacting the end of the drain electrode.
2. The array substrate according to claim 1, wherein each of the data line, the source electrode and the drain electrode is formed of a second metallic material being same as the first metallic material or being etched by an etchant for the first metallic material.
3. The array substrate according to claim 1, wherein a width of the groove is smaller than a distance between the first and second lines.
4. The array substrate according to claim 1, wherein a length of the groove is smaller than a distance between two adjacent data lines.
5. The array substrate according to claim 1, wherein the passivation layer contacts the substrate at the groove.
6. The array substrate according to claim 1, wherein the pixel electrode has a thickness smaller than the passivation layer.
7. The array substrate according to claim 1, further comprising:
a gate link line on the substrate and connected to an end of the gate line, wherein the gate insulating layer further includes a link contact hole exposing the gate link line;
a gate pad on the gate insulating layer and contacting the gate link line through the link contact hole;
a data pad on the gate insulating layer and connected to an end of the data line; and
a gate pad electrode and a data pad electrode on the passivation layer,
wherein a gate pad contact hole exposing the gate pad and a data pad contact hole exposing the data pad are formed through the passivation layer, and the gate pad electrode and the data pad electrode respectively contact the gate pad and the data pad through the gate pad contact hole and the data pad contact hole.
8-18. (canceled)