What is claimed is:
1. A semiconductor device for supplying a signal to an electro-optical device which displays a two-dimensional image, the semiconductor device comprising:
first terminals which are formed along a first side of the semiconductor device in a longitudinal direction and have a length L1 in a direction intersecting the longitudinal direction at right angles; and
second terminals which are formed along a second side intersecting the first side at right angles and have a length L2 which is greater than the length L1 in the longitudinal direction.
2. The semiconductor device as defined in claim 1,
wherein a width of each of the first terminals is equal to a width of each of the second terminals.
3. The semiconductor device as defined in claim 1,
wherein a pitch of the first terminals is equal to a pitch of the second terminals.
4. The semiconductor device as defined in claim 1,
wherein the first terminals and the second terminals are formed by bumps.
5. The semiconductor device as defined in claim 1, further comprising third terminals which are formed along a third side intersecting the first side at right angles and have a length L3 which is greater than the length L1 in the longitudinal direction.
6. The semiconductor device as defined in claim 5,
wherein the length L3 of the third terminals is equal to the length L2 of the second terminals.
7. The semiconductor device as defined in claim 1,
wherein the first terminals include output terminals for supplying a signal to first electrodes of the electro-optical device, and
wherein the second terminals include output terminals for supplying a signal to second electrodes which intersect the first electrodes.
8. The semiconductor device as defined in claim 1,
wherein, when a length of the semiconductor device in the longitudinal direction is X1, a width of each of the first terminals is WX, and a width of each of the second terminals is WY, the semiconductor device satisfies the following equation (1):
L2L1(WXX1)WY(X12) sin (1)
wherein X1 is an assumed alignment error of the semiconductor device in the longitudinal direction when mounting the semiconductor device on a substrate, and X1Y1 (where Y1 is an assumed alignment error of the semiconductor device in the direction intersecting the longitudinal direction at right angles when mounting the semiconductor device on the substrate) is satisfied, and
wherein is an assumed angular alignment error of the semiconductor device when mounting the semiconductor device on the substrate.
9. The semiconductor device as defined in claim 8,
wherein X1 is 4 to 8 m, and is 0.015 to 0.025.
10. The semiconductor device as defined in claim 1,
wherein ratio of the length L1 to the length L2 (L2L1) is 1.02 to 3.44.
11. An electro-optical device having an electro-optical material layer, the electro-optical device comprising:
the semiconductor device as defined in any one of claims 1 to 10 provided over a substrate,
wherein the first terminals include output terminals for supplying a signal to first electrodes, and
wherein the second terminals include output terminals for supplying a signal to second electrodes which intersect the first electrodes.
12. The electro-optical device as defined in claim 11,
wherein the substrate is the same as a substrate on which the electro-optical material layer is formed.
13. The electro-optical device as defined in claim 11,
wherein the substrate differs from a substrate on which the electro-optical material layer is formed.
14. The electro-optical device as defined in claim 11,
wherein, when a length of the semiconductor device in the longitudinal direction is X1, a width of each of the first terminals is WX, a width of each of the second terminals is WY, a width of each of electrodes on the substrate disposed in the longitudinal direction of the semiconductor device is WLX, and a width of each of electrodes on the substrate disposed in the direction intersecting the longitudinal direction of the semiconductor device at right angles is WLY, the electro-optical device satisfies the following equation (2):
3
L2
L1
{
(
W
X
+
W
LX
)
2
–
X
1
}
{
(
W
Y
+
W
LY
)
2
–
Y
1
–
(
X
1
2
)
sin
}
(
2
)
wherein X1 is an assumed alignment error of the semiconductor device in the longitudinal direction when mounting the semiconductor device on the substrate,
wherein Y1 is an assumed alignment error of the semiconductor device in the direction intersecting the longitudinal direction at right angles when mounting the semiconductor device on the substrate, and
wherein is an assumed angular alignment error of the semiconductor device when mounting the semiconductor device on the substrate.
15. The electro-optical device as defined in claim 14,
wherein X1 is 4 to 8 m, Y1 is 4 to 8 m, and is 0.015 to 0.025.
16. The electro-optical device as defined in claim 11,
wherein the ratio of the length L1 to the length L2 (L2L1) is 1.02 to 3.44.
17. The electro-optical device as defined in claim 11,
wherein the first electrodes are ones of data lines and scanning lines, and the second electrodes are the other of the data lines and the scanning lines.
18. The electro-optical device as defined in claim 11,
wherein the electro-optical material is a liquid crystal material, and the liquid crystal material layer is sealed between two substrates which face each other.
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 display panel comprising:
a pair of substrates faced to each other as a display material layer is sandwiched therebetween;
a plurality of pixels provided in a plane parallel with a substrate surface between the substrates; and
a plurality of alignment marks formed in different shapes and linearly arranged on at least one of the pair of the substrates at a predetermined interval for alignment in placing the display panels in layers.
2. The display panel according to claim 1, wherein the plurality of the alignment marks are arranged in parallel with a direction of extending an electrode to drive the plurality of the pixels.
3. The display panel according to claim 1, wherein the predetermined interval is equal to a distance of an integral multiple of a pixel pitch.
4. The display panel according to claim 1, wherein the alignment marks are formed to contact with two facing surfaces of the pair of the substrates.
5. The display panel according to claim 4, comprising a spacer configured to contact with the two facing surfaces for holding an interval between the pair of the substrates,
wherein the alignment marks are formed of the same material as a material of forming the spacer in the same layer.
6. The display panel according to claim 1, wherein the plurality of the pixels are provided in a dot matrix.
7. The display panel according to claim 1, wherein the display material layer has liquid crystals forming a cholesteric phase.
8. A multi-layer display element comprising a plurality of display panels placed in layers,
wherein the display panel is the display panel according to claim 1.
9. The multi-layer display element according to claim 8, wherein the display panel has a pixel area formed of the plurality of the pixels, and
pixel areas of the display panels adjacently placed in layers are displaced in a direction of arranging the alignment marks.
10. A method of fabricating a multi-layer display element, the method comprising the steps of:
preparing a plurality of display panels, each including a pair of substrates faced to each other as a display material layer is sandwiched therebetween, a plurality of pixels provided along a display surface of the substrates, and a plurality of alignment marks formed in different shapes and linearly arranged on at least one of the pair of the substrates at a predetermined interval for alignment in placing the display panels in layers;
laying the plurality of the display panels on each other;
aligning the alignment marks in different shapes formed in the adjacent display panels with each other; and
bonding the plurality of the display panels together.
11. The method according to claim 10, wherein the plurality of the alignment marks are formed so as to be arranged in parallel with a direction of extending an electrode to drive the plurality of the pixels.
12. The method according to claim 10, wherein the predetermined interval is equal to a distance of an integral multiple of a pixel pitch.
13. The method according to claim 10, wherein the alignment marks are formed to contact with two facing surfaces of the pair of the substrates.
14. The method according to claim 13, wherein the alignment marks are formed of the same material as a material of forming a spacer at the same time in the same layer, the spacer configured to contact with the two facing surfaces for holding an interval between the pair of the substrates.
15. The method according to claim 10, wherein the plurality of the pixels are provided in a dot matrix.
16. The method according to claim 10, wherein liquid crystals for forming a cholesteric phase are used for the display material layer.
17. The method according to claim 16, wherein the display panels are placed in layers such that pixel areas formed of the plurality of the pixels are displaced in a direction of arranging the alignment marks.
18. The method according to claim 10, wherein the alignment marks formed in each of the display panels are visually recognized in the same visual field, and
the display panel is moved to align the alignment marks with each other.