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A flat panel display device comprises a pair of substrates facing each other, a spacer, made of photosensitive material, for providing a gap between the pair of substrates, and a display medium arranged in the gap. At least one of the pair of substrates has a lightproof region including a linear por

A flat panel display device comprises a pair of substrates facing each other, a spacer, made of photosensitive material, for providing a gap between the pair of substrates, and a display medium arranged in the gap. At least one of the pair of substrates has a lightproof region including a linear portion. The spacer is arranged in the linear portion of the lightproof region. The spacer has a shape a longitudinal axis of which extends along the linear portion and which has a recessed portion narrower than the linear portion.

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1. A flat panel display device comprising: a pair of substrates facing each other; a spacer, made of photosensitive material, for providing a gap between the pair of substrates; and a display medium arranged in the gap, at least one of the pair of substrates having a lightproof region includin

1. A flat panel display device comprising: a pair of substrates facing each other; a spacer, made of photosensitive material, for providing a gap between the pair of substrates; and a display medium arranged in the gap, at least one of the pair of substrates having a lightproof region including a linear portion, and the spacer being arranged in the linear portion and having a shape a longitudinal axis of which extends along the linear portion and which has a recessed portion in a horizontal cross-sectional view along with one of the pair of substrates narrower than the linear portion. 2. A flat panel display device according to claim 1, wherein the one of the pair of substrates is an array substrate including a wiring portion and a switching element, and the lightproof region is the wiring portion. 3. A flat panel display device according to claim 2, wherein the array substrate has a pixel electrode for driving the display medium, and the wiring portion is a storage capacitance line for forming a storage capacitance between the pixel electrode and the wiring portion. 4. A flat panel display device according to claim 1, wherein the spacer is colored. 5. A flat panel display device comprising: a pair of substrates facing each other; a spacer, made of photosensitive material, for providing a gap between the pair of substrates the spacer having a recessed portion in a horizontal cross-sectional view along with one of the pair of substrates; and a display medium arranged in the gap, wherein the spacer is black. 6. A flat panel display device comprising: a pair of substrates facing each other; a spacer, made of photosensitive material, for providing a gap between the pair of substrates; and a display medium arranged in the gap, the spacer having a recessed portion in a horizontal cross-sectional view along with one of the pair of substrates. 7. A method for manufacturing a flat panel display device comprising the steps of: forming a photosensitive spacer material on a first substrate; exposing the spacer material using a mask having a predetermined pattern and developing the exposed spacer material; and adhering the first substrate to a second substrate, the mask having the predetermined pattern for exposing the spacer material to a shape having a recessed portion in a horizontal cross-sectional view along with the first substrate or the second substrate. 8. A method for manufacturing a flat panel display device according to claim 7, wherein the predetermined pattern has a narrow portion corresponding to the recessed portion of the spacer. 9. A method for manufacturing a flat panel display device according to claim 7, wherein the predetermined pattern comprises a plurality of polygonal patterns or a plurality of circular patterns arranged at a distance smaller than an exposure resolution.