JP2015143882A - Electro-optic device and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electro-optic device and electronic equipment having high transmittance for light transmitting through a pixel and capable of effectively using light emitting from a light source.SOLUTION: A liquid crystal device as an embodiment of the electro-optic device includes an element substrate 10, a light-transmitting pixel electrode 15 disposed in a pixel, a storage capacitor 16 disposed between the element substrate 10 and the pixel electrode 15 and having a pair of light-transmitting electrodes disposed to oppose each other through a dielectric layer 16b, and a third interlayer insulating film 14 disposed between the storage capacitor 16 and the pixel electrode 15. Each film thickness of the pixel electrode 15, a first electrode 16a and a second electrode 16c as the pair of light-transmitting electrodes, and the third interlayer insulating film 14 is set in such a manner that the spectral distribution of light transmitting through the pixel shows peaks of transmittance respectively corresponding to the wavelength ranges of at least red, green and blue.

Description

  The present invention relates to an electro-optical device and an electronic apparatus.

  As the electro-optical device, for example, an active drive type liquid crystal device used as light modulation means (light valve) of a liquid crystal projector can be cited. A pixel of the liquid crystal device includes a pixel circuit including a pixel electrode, a transistor that controls switching of the pixel electrode, and a storage capacitor for holding an image signal written to the pixel electrode.

  In such a liquid crystal device, in order to realize a better display quality, for example, an attempt is made to increase the number of pixels. Increasing the number of pixels without changing the size of the liquid crystal device leads to higher definition of the pixels, and of course, how to secure a storage capacitor with a predetermined electric capacity as well as miniaturization of the transistor is a problem It has become.

In order to solve the above problems, a transparent conductive film provided on an upper layer of a transistor element, a dielectric layer formed on the transparent conductive film, and the transparent conductive film in an opening region through which light can be transmitted in the display region. An electro-optical device that includes a transparent capacitor electrode that forms a storage capacitor together with a film and the dielectric layer and is electrically connected to the transistor element is disclosed (Patent Document 1).
According to the electro-optical device, since the storage capacitor is configured in the opening region, a desired capacitance in the storage capacitor can be obtained even when the pixel becomes high-definition as compared with the case where the storage capacitor is formed in the non-opening region. Can be secured.

JP 2010-176119 A

  However, if the transparent conductive film and the pixel electrode are simply overlapped with a translucent dielectric layer in between, the light transmitted through the opening region is absorbed by these thin film layers or reflected at the interface of the thin film layers. As a result, the desired transmittance may not always be obtained. In other words, when a transparent storage capacitor is provided in the opening region of the pixel, there is a problem that it is necessary to optimize the transmittance of light transmitted through the opening region.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An electro-optical device according to this application example is disposed so as to face a substrate, a light-transmitting pixel electrode arranged in a pixel, and a dielectric layer between the substrate and the pixel electrode. A storage capacitor having a pair of translucent electrodes, and an interlayer insulating film between the storage capacitor and the pixel electrode, and a spectral distribution of light transmitted through the pixel is at least of red, green, and blue The film thicknesses of the pixel electrode, the pair of translucent electrodes, and the interlayer insulating film are set so as to have a transmittance peak corresponding to each wavelength range.

  According to this configuration, the thickness of each of the pixel electrode, the pair of translucent electrodes constituting the storage capacitor, and the interlayer insulating film therebetween is adjusted and set. An electro-optical device can be provided in which the light transmittance is high over the wavelength range of visible light.

Application Example 2 In the electro-optical device according to the application example described above, the pixel electrode and the pair of translucent electrodes are made of an ITO film, and one of the ITO films has a thickness of 140 nm ± 10%. The remaining ITO film thickness is in the range of 140 nm ± 5%, the interlayer insulating film is made of silicon oxide film, and the thickness of the silicon oxide film is in the range of 175 nm ± 10%. Preferably there is.
According to this configuration, an electro-optic having a high light transmittance in the aperture region of the pixel using an ITO film, which is a general transparent conductive material, or a silicon oxide film, which is also a general insulating material. A device can be realized.

Application Example 3 In the electro-optical device according to the application example, the interlayer insulating film is stacked on the storage capacitor side first silicon oxide film and the first silicon oxide film, and is doped with boron. It is preferable to include a silicon film.
According to this configuration, the first silicon oxide film is covered with the second silicon oxide film doped with chemically more stable boron, and then the pixel electrode is formed using, for example, a photolithography method. However, it is possible to avoid a problem that the interlayer insulating film is altered or etched to change the film thickness. That is, by using an interlayer insulating film having stable film quality and film thickness, high transmittance in the pixel can be stably ensured as a result.

Application Example 4 An electronic apparatus according to this application example includes the electro-optical device according to the application example described above.
According to this, it is possible to provide an electronic device that realizes brighter display quality than before.

Application Example 5 In the electronic apparatus according to the application example described above, the electronic apparatus includes a light source that illuminates the electro-optical device. It is characterized in that at least peak wavelengths of transmittance corresponding to each wavelength range of red, green, and blue in a spectral distribution of light transmitted through the pixel of the optical device substantially match.
According to this, it is possible to provide an electronic device in which light emitted from the light source is efficiently used and bright display quality is realized.

(A) is a schematic plan view which shows the structure of a liquid crystal device, (b) is a schematic sectional drawing cut | disconnected by the H-H 'line | wire of (a). FIG. 3 is an equivalent circuit diagram illustrating an electrical configuration of the liquid crystal device. FIG. 3 is a schematic plan view showing the arrangement of pixels in a liquid crystal device. FIG. 5A is a schematic plan view showing the arrangement of thin film transistors and signal lines in a pixel, and FIG. 5B is a schematic plan view showing the arrangement of a pair of translucent electrodes and pixel electrodes of a storage capacitor in the pixel. FIG. 5 is a schematic cross-sectional view illustrating the structure of a pixel cut along line A-A ′ in FIG. 4. FIG. 4 is a schematic cross-sectional view illustrating the structure of a pixel cut along line B-B ′ in FIG. 3. (A) is the table | surface which shows the film thickness of the 1st electrode in Example 1- Example 4, a 2nd electrode, a 3rd interlayer insulation film, and a pixel electrode, (b) is the 1st electrode in Examples 5-10. , A table showing the film thickness of the second electrode, the third interlayer insulating film, and the pixel electrode, (c) is a film of the first electrode, the second electrode, the third interlayer insulating film, and the pixel electrode in Comparative Examples 1 to 6 Table showing thickness. The graph which shows the spectral distribution of the transmitted light in Example 1 and Comparative Examples 1 to 3. The graph which shows the spectral distribution of the transmitted light in Example 1- Example 4 and Comparative Examples 4 and 5. FIG. The graph which shows the spectral distribution of the transmitted light in Example 1 and Examples 5-8. The graph which shows the spectral distribution of the transmitted light in Example 1, Example 9, 10, and the comparative example 6. FIG. Schematic which shows the structure of the projection type display apparatus as an electronic device.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. Note that the drawings to be used are appropriately enlarged or reduced so that the part to be described can be recognized.

  In the following embodiments, for example, when “on the substrate” is described, the substrate is disposed so as to be in contact with the substrate, or is disposed on the substrate via another component, or the substrate. It is assumed that a part is arranged so as to be in contact with each other and a part is arranged via another component.

(First embodiment)
<Liquid crystal device>
First, a liquid crystal device as an electro-optical device according to this embodiment will be described with reference to FIGS. 1 and 2. 1A is a schematic plan view showing the configuration of the liquid crystal device, FIG. 1B is a schematic cross-sectional view taken along line HH ′ of FIG. 1A, and FIG. 2 is an electrical configuration of the liquid crystal device. FIG.

  As shown in FIGS. 1A and 1B, a liquid crystal device 100 as an electro-optical device according to this embodiment includes a liquid crystal device sandwiched between an element substrate 10 and a counter substrate 20 which are arranged to face each other and the pair of substrates. Layer 50. The element substrate 10 and the counter substrate 20 are made of a transparent substrate such as a quartz substrate or a glass substrate.

  The element substrate 10 as a substrate in the present invention is slightly larger than the counter substrate 20, and both the substrates are bonded via a sealing material 40 arranged in a frame shape, and positive or negative dielectric anisotropy is provided in the gap. The liquid crystal layer 50 is configured by enclosing the liquid crystal. For the sealing material 40, for example, an adhesive such as a thermosetting or ultraviolet curable epoxy resin is employed. A spacer (not shown) is mixed in the sealing material 40 to keep the distance between the pair of substrates constant.

  A light shielding film 21 is similarly provided in a frame shape inside the sealing material 40 arranged in a frame shape. The light shielding film 21 is made of, for example, a light shielding metal or metal oxide, and the inside of the light shielding film 21 is a display region E. In the display area E, a plurality of pixels P are arranged in a matrix. The display area E may include a plurality of dummy pixels arranged so as to surround a plurality of effective pixels P that contribute to display. Although not shown in FIG. 1, the display area E is also provided with a light-shielding portion that divides a plurality of pixels P in a plane.

A data line driving circuit 101 is provided between the element substrate 10 and the sealing material 40 along one side. Further, an inspection circuit 103 is provided inside the sealing material 40 along the other one side facing the one side. Further, a scanning line driving circuit 102 is provided inside the sealing material 40 along the other two sides orthogonal to the one side and facing each other. A plurality of wirings 105 that connect the two scanning line driving circuits 102 are provided inside the sealing material 40 on the other side facing the one side. Wirings connected to the data line driving circuit 101 and the scanning line driving circuit 102 are connected to a plurality of external connection terminals 104 arranged along the one side.
Hereinafter, the direction along the one side will be referred to as the X direction, and the direction along the other two sides orthogonal to the one side and facing each other will be described as the Y direction.

As shown in FIG. 1B, on the surface of the element substrate 10 on the liquid crystal layer 50 side, a light-transmitting pixel electrode 15 provided for each pixel P and a thin film transistor (TFT; Thin Film) as a switching element. Transistor (hereinafter also referred to as TFT) 30, a signal wiring, and an alignment film 18 that covers the plurality of pixel electrodes 15 are formed.
Further, a light shielding structure is employed that prevents light from entering the semiconductor layer in the TFT 30 and causing a light leakage current to flow, resulting in an inappropriate switching operation.

  On the surface of the counter substrate 20 on the liquid crystal layer 50 side, a light shielding film 21, an interlayer insulating film 22 formed so as to cover the light shielding film 21, and an interlayer insulating film 22 covering at least the display region E are provided. The counter electrode 23 and an alignment film 24 covering the counter electrode 23 are provided.

  As shown in FIG. 1A, the light shielding film 21 is provided in a frame shape at a position where the data line driving circuit 101, the scanning line driving circuit 102, and the inspection circuit 103 overlap in plan view. Thus, the light incident from the counter substrate 20 side is shielded, and the malfunction of the peripheral circuits including these drive circuits due to the light is prevented. Further, unnecessary stray light is shielded from entering the display area E, and high contrast in the display of the display area E is ensured.

  The interlayer insulating film 22 is made of an inorganic material such as silicon oxide, for example, and is provided so as to cover the light shielding film 21 with light transmittance. In addition, the interlayer insulating film 22 also functions as a planarizing layer that relaxes unevenness generated on the substrate by the light shielding film 21. As a method for forming the interlayer insulating film 22, for example, a method of forming a film using a plasma CVD method or the like can be given.

  The counter electrode 23 is made of, for example, a transparent conductive film such as ITO, and covers the interlayer insulating film 22 and, as shown in FIG. 1A, the element substrate 10 side by the vertical conduction portions 106 provided at the four corners of the counter substrate 20. It is electrically connected to the wiring.

  The alignment film 18 that covers the pixel electrode 15 and the alignment film 24 that covers the counter electrode 23 are selected based on the optical design of the liquid crystal device 100. For example, by depositing an organic material such as polyimide and rubbing the surface, liquid crystal molecules having positive dielectric anisotropy are subjected to a substantially horizontal alignment treatment, or SiOx (silicon oxide) Inorganic materials such as those described above are formed by vapor deposition, and liquid crystal molecules having negative dielectric anisotropy are subjected to a substantially vertical alignment treatment.

  As shown in FIG. 2, the liquid crystal device 100 includes a plurality of scanning lines 3 a and a plurality of data lines 6 a as signal lines that are insulated and orthogonal to each other at least in the display region E, and capacitance lines parallel to the scanning lines 3 a. 3b.

  A pixel electrode 15, a TFT 30, and a storage capacitor 16 are provided in a region divided by the scanning line 3a and the data line 6a, and these constitute a pixel circuit of the pixel P.

The scanning line 3 a is electrically connected to the gate of the TFT 30, and the data line 6 a is electrically connected to the source of the TFT 30. The pixel electrode 15 is electrically connected to the drain of the TFT 30.
The data line 6a is connected to the data line driving circuit 101 (see FIG. 1), and supplies image signals D1, D2,..., Dn supplied from the data line driving circuit 101 to the pixels P. The scanning line 3a is connected to a scanning line driving circuit 102 (see FIG. 1), and supplies scanning signals SC1, SC2,..., SCm supplied from the scanning line driving circuit 102 to each pixel P. The image signals D1 to Dn supplied from the data line driving circuit 101 to the data lines 6a may be supplied line-sequentially in this order, or may be supplied for each of a plurality of adjacent data lines 6a for each group. Good. The scanning line driving circuit 102 supplies the scanning signals SC1 to SCm to the scanning line 3a in a pulse-sequential manner at a predetermined timing.

In the liquid crystal device 100, the TFT 30 that is a switching element is turned on for a certain period by the input of the scanning signals SC1 to SCm, so that the image signals D1 to Dn supplied from the data line 6a are at the pixel electrode 15 at a predetermined timing. It is the structure written in. The predetermined level of image signals D1 to Dn written to the liquid crystal layer 50 through the pixel electrode 15 are held for a certain period between the pixel electrode 15 and the counter electrode 23 arranged to face each other through the liquid crystal layer 50. The
In order to prevent the retained image signals D1 to Dn from leaking, a storage capacitor 16 is connected in parallel with a liquid crystal capacitor formed between the pixel electrode 15 and the counter electrode 23. The storage capacitor 16 is provided between the drain of the TFT 30 and the capacitor line 3b. As will be described in detail later, in the present embodiment, one of the pair of translucent electrodes constituting the storage capacitor 16 functions as the capacitor line 3b.

  Note that a data line 6a is connected to the inspection circuit 103 shown in FIG. 1A, and an operation defect or the like of the liquid crystal device 100 is confirmed by detecting the image signal in the manufacturing process of the liquid crystal device 100. Although it can be configured, it is omitted in the equivalent circuit of FIG. The inspection circuit 103 includes a sampling circuit that samples the image signal and supplies it to the data line 6a, and a precharge circuit that supplies a precharge signal of a predetermined voltage level to the data line 6a prior to the image signal. Also good.

  Such a liquid crystal device 100 is a transmission type, and adopts an optical design of a normally black mode in which a dark display is obtained when the pixel P is not driven and a normally white mode in which a bright display is obtained when the pixel P is not driven. Depending on the optical design, polarizing elements are respectively used on the light incident side and the light exit side.

  Next, the planar arrangement and structure of the pixel P will be described with reference to FIGS. 3 is a schematic plan view showing the arrangement of pixels in the liquid crystal device, FIG. 4A is a schematic plan view showing the arrangement of thin film transistors and signal lines in the pixels, and FIG. 3B is a pair of transparent capacitors of the storage capacitors in the pixels. 5 is a schematic plan view showing the arrangement of the photoelectrode and the pixel electrode, FIG. 5 is a schematic sectional view showing the structure of the pixel cut along the line AA ′ in FIG. 4, and FIG. 6 is cut along the line BB ′ in FIG. It is a schematic sectional drawing which shows the structure of another pixel.

  As shown in FIG. 3, the pixel P in the liquid crystal device 100 has, for example, a substantially quadrangular (substantially square) opening region in plan view. The opening area is surrounded by a light-shielding non-opening area extending in the X direction and the Y direction and provided in a lattice shape.

  A scanning line 3a shown in FIG. 2 is provided in the non-opening region extending in the X direction. The scanning line 3a uses a light-shielding conductive member, and at least a part of the non-opening region is constituted by the scanning line 3a.

  Similarly, a data line 6a shown in FIG. 2 is provided in the non-opening region extending in the Y direction. The data line 6a also uses a light-shielding conductive member, and at least a part of the non-opening region is constituted by these.

  The non-opening region is formed not only by the signal lines provided on the element substrate 10 side, but also by a light shielding film 21 patterned in a lattice pattern on the counter substrate 20 side.

  The TFT 30 shown in FIG. 2 is provided near the intersection of the non-opening regions. By providing the TFT 30 in the vicinity of the intersection of the non-opening region having the light shielding property, the optical malfunction of the TFT 30 is prevented and the aperture ratio in the opening region is secured. Although the detailed structure of the pixel P will be described later, the width of the non-opening region in the vicinity of the intersecting portion is wider than that in other portions due to the provision of the TFT 30 near the intersecting portion.

Next, each component such as a thin film transistor in the pixel circuit of the pixel P will be described with reference to FIGS.
As shown in FIG. 4, the pixel P includes a TFT 30 provided at the intersection of the scanning line 3a and the data line 6a. The TFT 30 includes a data line side source / drain region 30s, a channel region 30c, a pixel electrode side source / drain region 30d, and a junction region 30e provided between the data line side source / drain region 30s and the channel region 30c. And a semiconductor layer 30a having an LDD (Lightly Doped Drain) structure having a junction region 30f provided between the channel region 30c and the pixel electrode side source / drain region 30d. The semiconductor layer 30a is disposed so as to pass through the intersection and overlap the scanning line 3a.

  The scanning line 3a has a quadrangular extended portion in a plan view extended in the X and Y directions at the intersection with the data line 6a. A bent gate electrode 30g having an opening that overlaps the extension portion in a plan view and that does not overlap the junction region 30f and the pixel electrode side source / drain region 30d is provided.

  In the gate electrode 30g, the portion extending in the Y direction overlaps the channel region 30c in a plane. Further, the scanning lines 3a and CNT4 are bent by contact holes CNT3 and CNT4 that are bent from the portion overlapping the channel region 30c and extend in the X direction, and the portions facing each other are provided between the extended portions of the scanning line 3a. Electrically connected.

  The contact holes CNT3 and CNT4 are rectangular (rectangular) having a long X direction in plan view, and are provided on both sides so as to sandwich the junction region 30f along the channel region 30c and the junction region 30f of the semiconductor layer 30a. Yes.

The data line 6a extends in the Y direction and also has a rectangular extension at the intersection with the scanning line 3a, and is formed by a contact hole CNT1 provided in the protrusion 6c protruding from the extension in the X direction. It is electrically connected to the data line side source / drain region 30s. A portion including the contact hole CNT1 is a source electrode 31. On the other hand, the contact hole CNT2 is also provided at the end of the pixel electrode side source / drain region 30d, and the portion including the contact hole CNT2 serves as the drain electrode 32.
Contact holes CNT6, CNT5, and CNT7 are provided adjacent to the contact hole CNT2 in the extending direction (X direction) of the scanning line 3a. The contact hole CNT2 and the contact hole CNT5 are electrically connected via a first relay electrode 6b provided in an island shape. The contact hole CNT6 and the contact hole CNT7 are electrically connected via the second relay electrode 7b provided in the same island shape.

As shown in FIG. 4B, the pixel electrode 15 is arranged so as to overlap the above-described opening region (see FIG. 3) in a plan view and the outer edge portion covers the non-opening region (see FIG. 3). Further, the pixel electrode 15 has a protrusion 15a for electrical connection with the contact hole CNT7. That is, the pixel electrode 15 has a substantially rectangular (substantially square) island shape provided for each pixel P.
The storage capacitor 16 has a first electrode 16a and a second electrode 16c as a pair of translucent electrodes. The first electrode 16a is provided for each pixel P so as to overlap the pixel electrode 15 in the above-described opening region (see FIG. 3). The first electrode 16a has a protruding portion 16aa for electrical connection with the contact hole CNT6. That is, the first electrode 16 a has a substantially quadrangular (substantially square) island shape like the pixel electrode 15.

  On the other hand, the second electrode 16c is provided so as to straddle a plurality of pixels P arranged in a matrix in the X direction and the Y direction. In addition, the contact hole CNT6 to which the first electrode 16a is electrically connected and the contact hole CNT7 to which the pixel electrode 15 is electrically connected and the second electrode 16c are provided with an opening 16ch which is opened. ing. That is, the second electrode 16 c is provided so as to extend over the display area E, and has the function of the capacitance line 3 b common to the plurality of pixels P. A part of the second electrode 16c is drawn to the outside of the display region E and is electrically connected to a wiring to which a fixed potential is supplied.

  As shown in FIG. 5, the scanning line 3 a is first formed on the element substrate 10. The scanning line 3a also serves as a light-shielding film that shields the semiconductor layer 30a. For example, the scanning line 3a includes a metal simple substance including at least one of metals such as Al, Ti, Cr, W, Ta, and Mo, an alloy, a metal silicide, and a polycrystal. Silicide, nitride, or a laminate of these can be used and has light shielding properties.

  A base insulating film 10a made of, for example, silicon oxide is formed so as to cover the scanning line 3a, and a semiconductor layer 30a is formed in an island shape on the base insulating film 10a. The semiconductor layer 30a is made of, for example, a polycrystalline silicon film, and is implanted with impurity ions, and the data line side source / drain region 30s, the junction region 30e, the channel region 30c, the junction region 30f, and the pixel electrode side source / drain region 30d described above. An LDD structure having is formed.

  A first insulating film (gate insulating film) 11a made of, for example, silicon oxide is formed so as to cover the semiconductor layer 30a. Further, a gate electrode 30g is formed at a position facing the channel region 30c with the first insulating film 11a interposed therebetween. The gate electrode 30g can be formed using, for example, a polycrystalline silicon film, and at the same time, the scanning line 3a (expanded portion) and the gate electrode 30g are electrically passed through the base insulating film 10a and the first insulating film 11a. Contact holes CNT3 and CNT4 (not shown) to be connected are also formed.

  A second insulating film 11b made of, for example, silicon oxide is formed so as to cover the gate electrode 30g and the first insulating film 11a. A contact hole CNT1 penetrating through the first insulating film 11a and the second insulating film 11b overlapping the data line side source / drain region 30s of the semiconductor layer 30a is formed. Similarly, a contact hole CNT2 penetrating the first insulating film 11a and the second insulating film 11b overlapping the pixel electrode side source / drain region 30d of the semiconductor layer 30a is formed. Subsequently, a conductive film made of a light-shielding metal such as Al is formed and patterned so as to cover the second insulating film 11b, whereby the data line side source / drain region 30s is electrically connected to the data line side source / drain region 30s via the contact hole CNT1. Connected data lines 6a are formed. At the same time, the first relay electrode 6b electrically connected to the pixel electrode side source / drain region 30d through the contact hole CNT2 is formed.

  Subsequently, a first interlayer insulating film 12 is formed so as to cover the data line 6a and the first relay electrode 6b. The first interlayer insulating film 12 is made of, for example, silicon oxide, nitride, or oxynitride, and is subjected to a flattening process for flattening the surface unevenness caused by covering the region where the TFT 30 is provided. Examples of the planarization method include chemical mechanical polishing (CMP) and spin coating.

A contact hole CNT5 penetrating the first interlayer insulating film 12 is formed at a position overlapping the first relay electrode 6b. A conductive film made of a light-shielding metal such as Al is formed so as to cover the contact hole CNT5 and cover the first interlayer insulating film 12, and the wiring 7a and the contact hole CNT5 are formed by patterning the conductive film. And a second relay electrode 7b electrically connected to the first relay electrode 6b.
The wiring 7a is formed so as to overlap with the semiconductor layer 30a and the data line 6a of the TFT 30 in a plan view, and functions as a shield layer when given a fixed potential.

  A second interlayer insulating film 13 is formed so as to cover the wiring 7a and the second relay electrode 7b. The second interlayer insulating film 13 can also be formed using, for example, silicon oxide, nitride, or oxynitride, and is subjected to a planarization process such as a CMP process.

  Next, a contact hole CNT6 that penetrates through the second interlayer insulating film 13 is formed at a position overlapping the second relay electrode 7b. A transparent conductive film such as ITO is formed so as to cover the contact hole CNT6 and the second interlayer insulating film 13, and the first electrode 16a having the protruding portion 16aa is formed by patterning the transparent conductive film. The The first electrode 16a is electrically connected to the second relay electrode 7b through the protrusion 16aa and the contact hole CNT6.

A dielectric layer 16b is formed on at least a portion of the first electrode 16a facing the second electrode 16c. As the dielectric layer 16b, a silicon nitride film, a single layer film such as humic oxide (HfO ₂ ), alumina (Al ₂ O ₃ ), tantalum oxide (Ta ₂ O ₅ ), or at least one of these single layer films is used. A multilayer film in which two types of single-layer films are stacked can be used. The thickness is set to 20 nm to 30 nm in consideration of electric capacity. The dielectric layer 16b is such an extremely thin thin film and has high transparency to visible light.

A transparent conductive film such as ITO is formed so as to cover the dielectric layer 16b, and the second electrode 16c functioning as the capacitor line 3b is formed by patterning the transparent conductive film. The second electrode 16c is formed so as to cover the surface including the side surface of the patterned dielectric layer 16b. Further, as described above, it is formed over the display region E including at least a plurality of pixels P, and the opening 16ch is formed in a portion overlapping the second relay electrode 7b in a plan view.
As a result, the first electrode 16a and the second electrode 16c are arranged to face each other with the dielectric layer 16b interposed therebetween, so that a translucent storage capacitor 16 is formed.

  A third interlayer insulating film 14 as an interlayer insulating film of the present invention is formed so as to cover the storage capacitor 16. The third interlayer insulating film 14 can also be formed using, for example, silicon oxide, and may be subjected to a planarization process such as a CMP process. In addition, chemically stable boron is prevented so that the third interlayer insulating film 14 is not altered and the film thickness does not change in the formation process of the pixel electrode 15 that is subsequently formed by photolithography. It is preferable to cover with a silicon oxide film doped with. That is, the third interlayer insulating film 14 is composed of the first silicon oxide film on the storage capacitor 16 side and the second silicon oxide film laminated on the first silicon oxide film and doped with boron.

  Next, a contact hole CNT7 penetrating through the second interlayer insulating film 13 and the third interlayer insulating film 14 is formed at a position overlapping the second relay electrode 7b. A transparent conductive film such as ITO is formed to cover the contact hole CNT7 and cover the third interlayer insulating film 14, and by patterning this, the second relay electrode 7b is electrically connected to the contact hole CNT7. A pixel electrode 15 to be connected is formed.

  According to such a wiring structure of the element substrate 10, the drain electrode 32 of the TFT 30 is electrically connected to the pixel electrode 15 through the first relay electrode 6b, the contact hole CNT5, the second relay electrode 7b, and the contact hole CNT7. Is done. The first relay electrode 6b, the contact hole CNT5, the second relay electrode 7b, and the contact hole CNT6 are electrically connected to the first electrode 16a of the storage capacitor 16.

  As shown in FIG. 6, in the opening region of the pixel P, a base insulating film 10 a, a first insulating film 11 a, a second insulating film 11 b, and a first interlayer insulating film 12 are sequentially formed on the transparent element substrate 10. A second interlayer insulating film 13, a light-transmitting storage capacitor 16, a third interlayer insulating film 14, and a pixel electrode 15 are provided.

The element substrate 10 has a pixel circuit configuration, and thus has a more complex layer (film) structure than the counter substrate 20. As described above, the base insulating film 10a, the first insulating film 11a, the second insulating film 11b, the first interlayer insulating film 12, the second interlayer insulating film 13 and the like are made of silicon oxide (silicon oxide film) or Since it is made of nitride or oxynitride, it has substantially the same refractive index (1.4 to 1.5 in the visible light region) as that of, for example, a quartz substrate constituting the element substrate 10. Therefore, since the refractive indexes are almost the same, the visible light transmitted through these layers (films) hardly reflects or refracts at the interface of the layers (films). Rate) is difficult to attenuate.
On the other hand, the structure from the storage capacitor 16 to the pixel electrode 15 has a first electrode 16a and a second electrode made of a transparent conductive film (if ITO, the refractive index is 1.5 to 1.9 in the visible light wavelength region). The dielectric layer 16b is sandwiched between the pixel electrode 16c and the third interlayer insulating film 14 is sandwiched between the pixel electrode 15 and the second electrode 16c, which is also made of a transparent conductive film. In other words, since the dielectric layer 16b and the third interlayer insulating film 14 having different (low) refractive index from the transparent conductive film are sandwiched between the transparent conductive films, the layers (films) are transmitted. The visible light that is reflected may be reflected or refracted at the interface of the layer (film), and the light intensity (transmittance) may be attenuated. The dielectric layer 16b has a thickness of 20 nm to 30 nm from the viewpoint of securing electric capacity as described above. In this film thickness range, it hardly affects the light transmittance in the aperture region, and can be ignored.

  In the present embodiment, the spectral distribution of light (transmitted light) transmitted through the aperture region of the pixel P has at least a red wavelength range (600 nm to 700 nm), a green wavelength range (500 nm to 600 nm), and a blue wavelength range (400 nm). The film thicknesses of the pixel electrode 15, the first electrode 16a and the second electrode 16c as a pair of translucent electrodes, and the third interlayer insulating film 14 so as to have transmittance peaks corresponding to .about.500 nm, respectively. Is set. Hereinafter, specific examples and comparative examples will be described.

  FIG. 7A is a table showing the film thicknesses of the first electrode, the second electrode, the third interlayer insulating film, and the pixel electrode in Examples 1 to 4, and FIG. The table showing the film thicknesses of the first electrode, the second electrode, the third interlayer insulating film, and the pixel electrode in FIG. 4C is the first electrode, the second electrode, and the third interlayer insulating film in Comparative Examples 1 to 6. It is a table | surface which shows the film thickness of a film | membrane and a pixel electrode. FIG. 8 is a graph showing the spectral distribution of transmitted light in Example 1 and Comparative Examples 1 to 3, and FIG. 9 is a graph showing the spectral distribution of transmitted light in Examples 1 to 4 and Comparative Examples 4 and 5. FIG. 10 is a graph showing the spectral distribution of transmitted light in Example 1 and Examples 5 to 8, and FIG. 11 is a graph showing the spectral distribution of transmitted light in Example 1, Examples 9, 10 and Comparative Example 6. is there.

  Hereinafter, with reference to FIGS. 7A to 7C, the first electrode 16a, the second electrode 16c, the third interlayer insulating film 14, and the pixels in Examples 1 to 10 and Comparative Examples 1 to 6 are described. The electrode 15 will be described.

Example 1
In Example 1, each of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 is made of an ITO film, and each film thickness is 140 nm. The third interlayer insulating film 14 is formed by laminating a first silicon oxide film and a second silicon oxide film doped with boron, and has a film thickness of 175 nm.

(Example 2)
In the second embodiment, the film thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are reduced by 5% (7 nm), respectively, and set to 133 nm.

(Example 3)
In the third embodiment, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are increased by 5% (7 nm), respectively, and set to 147 nm.

Example 4
In the fourth embodiment, the pixel electrode 15 is made 10% (14 nm) thicker than the first embodiment.

(Example 5)
In the fifth embodiment, the thickness of the third interlayer insulating film 14 is set to 166 nm by reducing the film thickness of the third interlayer insulating film 14 by 5% (9 nm).

(Example 6)
In Example 6, compared to Example 1, the thickness of the third interlayer insulating film 14 is set to 158 nm by reducing it by 10% (17 nm).

(Example 7)
In Example 7, compared with Example 1, the thickness of the third interlayer insulating film 14 is set to 184 nm by increasing it by 5% (9 nm).

(Example 8)
In Example 8, the thickness of the third interlayer insulating film 14 is set to 192 nm by increasing the film thickness of the third interlayer insulating film 14 by 10% (17 nm).

Example 9
In Example 9, compared with Example 1, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each reduced by 5% (7 nm) to 133 nm, and the third interlayer insulating film is formed. The film thickness of 14 is reduced by 5% (9 nm) and set to 166 nm.

(Example 10)
In Example 10, compared with Example 1, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each increased by 5% (7 nm) to 147 nm, and the third interlayer insulating film is formed. The film thickness of 14 is reduced by 5% (9 nm) and set to 166 nm.

(Comparative Example 1)
In Comparative Example 1, the thickness of the third interlayer insulating film 14 is set to 100 nm by reducing the film thickness of the third interlayer insulating film 14 by about 43% (75 nm).

(Comparative Example 2)
In Comparative Example 2, the thickness of the third interlayer insulating film 14 is about 43% (75 nm) thicker than that of Example 1, and is set to 250 nm.

(Comparative Example 3)
In Comparative Example 3, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are reduced by 29% (40 nm) and set to 100 nm as compared to Example 1.

(Comparative Example 4)
In Comparative Example 4, the film thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each reduced by 10% (14 nm) and set to 126 nm as compared with Example 1.

(Comparative Example 5)
In Comparative Example 5, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are 10% (14 nm) thicker than those in Example 1, and are set to 154 nm.

(Comparative Example 6)
In Comparative Example 6, compared with Example 1, the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each increased by 10% (14 nm) to 154 nm, and the third interlayer insulating film The film thickness of 14 is reduced by about 10% (17 nm) and set to 158 nm.

  Hereinafter, for Examples 1 to 10 and Comparative Examples 1 to 6, the spectral distribution of light (transmitted light) transmitted through the aperture region was determined by optical simulation. The spectral distribution graphs shown in FIGS. 8 to 11 are obtained by indexing the transmittance peak value in the red wavelength range (600 nm to 700 nm) in Example 1 as “1”. In addition, about the optical simulation which calculated | required the spectral distribution of transmitted light, compared with the result of having actually measured the spectral characteristic of the sample (prototype) corresponding to the film thickness structure of each Example or each comparative example, The validity of the simulation has been confirmed.

  As shown in FIG. 8, the spectral distribution of Example 1 has a transmittance in each of a red wavelength range (600 nm to 700 nm), a green wavelength range (500 nm to 600 nm), and a blue wavelength range (400 nm to 500 nm). It has a peak. Therefore, a high transmittance is realized over the visible light region. In particular, the red peak wavelength is approximately 660 nm, the green peak wavelength is approximately 550 nm, and the blue peak wavelength is approximately 460 nm, and so-called transmittance peaks appear at representative wavelengths corresponding to the three primary colors of light, Considering color reproducibility, it can be said that it is close to the ideal state. Therefore, hereinafter, other examples and comparative examples will be described with reference to Example 1.

  Compared to Example 1, the comparative example 1 in which the film thickness of the third interlayer insulating film 14 is reduced by approximately 43% and the comparative example 2 in which the film thickness is increased by approximately 43% are both in the green wavelength range (500 nm to 600 nm). The blue wavelength range (400 nm to 500 nm) shows a transmittance peak, but the red wavelength range (600 nm to 700 nm) shows no transmittance peak, compared to the green wavelength range (500 nm to 600 nm). The transmittance is significantly reduced. Further, the transmittance in the blue wavelength range (400 nm to 500 nm) is also significantly lower than that of Example 1.

  Compared to Example 1, Comparative Example 3 in which the thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each reduced by 29% includes a green wavelength range (500 nm to 600 nm) and a blue wavelength range ( 400 nm to 500 nm) shows a transmittance peak, but the red wavelength range (600 nm to 700 nm) does not show a transmittance peak, and the transmittance is significantly lower than the green wavelength range (500 nm to 600 nm). To do. In other words, the fluctuation range of the transmittance in the visible light wavelength range is large.

  As shown in FIG. 9, the second embodiment in which the thickness of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 is reduced by 5% and the third embodiment in which the thickness is increased by 5% are compared to the first embodiment. Similar to Example 1, each of the red wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm) has a transmittance peak. The transmittance at the peak is also equivalent. Further, the fluctuation range of the transmittance in the visible light wavelength range is substantially the same as that of the first embodiment.

  In Comparative Example 4 in which the film thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are reduced by 10% with respect to Example 1, the red wavelength range (600 nm to 700 nm) and the green wavelength range ( The transmittance peak is shown in each of the blue wavelength range (400 nm to 500 nm). However, the peak wavelength of transmittance is 490 nm in the blue wavelength range (400 nm to 500 nm), and the transmittance is lower than that in Example 1 in the wavelength range shorter than 490 nm. Further, although a transmittance peak appears in the vicinity of 430 nm, in practice, it is often used by cutting a short wavelength of 430 nm or less, so it cannot be said that sufficient transmittance can be secured. That is, it is inferior to Example 1 in that the intensity (light quantity) of blue light is insufficient.

  In contrast to Example 1, Example 4 in which only the film thickness of the pixel electrode 15 out of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 made of an ITO film is increased by 10% is a red wavelength range (600 nm to 700 nm), a transmittance peak in each of a green wavelength range (500 nm to 600 nm) and a blue wavelength range (400 nm to 500 nm). And compared with the comparative example 4, since the peak wavelength of the transmittance | permeability in a blue wavelength range (400 nm-500 nm) is shortened with about 470 nm, the transmittance | permeability in a blue wavelength range (400 nm-500 nm) becomes good. Yes. Such a tendency is not shown in FIG. 9, but the same applies to the spectral distribution when the film thickness of the first electrode 16a or the second electrode 16c is increased by 10% compared to the first embodiment.

  Further, in comparison with Example 1, the comparative example 5 in which the film thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each increased by 10%, the red wavelength range (600 nm to 700 nm), the green wavelength range Although the transmittance peak is shown in each of (500 nm to 600 nm) and the blue wavelength range (400 nm to 500 nm), each transmittance peak is shifted to the short wavelength side of each wavelength range. As in the case of Comparative Example 4, when a short wavelength of 430 nm or less is cut and used, the intensity (light quantity) of blue light is insufficient compared to Example 1.

  As shown in FIG. 10, Example 5 in which the film thickness of the third interlayer insulating film 14 is 5% thinner than Example 1 is 5% thicker. In the wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm). The transmittance at the peak is almost the same. Further, the fluctuation range of the transmittance in the visible light wavelength range is almost the same as that of the first embodiment.

  In contrast to Example 1, Example 6 in which the film thickness of the third interlayer insulating film 14 is reduced by 10%, and Example 8 in which the film thickness is increased by 10% are also in the red wavelength range (600 nm to 700 nm). , Each having a transmittance peak in the green wavelength range (500 nm to 600 nm) and the blue wavelength range (400 nm to 500 nm). The transmittance at the peak is almost the same. Further, although the fluctuation range of the transmittance in the visible light wavelength range is slightly larger than those in Example 5 and Example 7, the peak wavelength of the transmittance is not so shifted from that in Example 1 and is practically used. It can be said that there is no problem above.

  As shown in FIG. 11, the first electrode 16a, the second electrode 16c, the pixel electrode 15, and the third interlayer insulating film 14 are made thinner by 5% than in the first embodiment. Example 10 in which the film thickness of the electrode 16a, the second electrode 16c, and the pixel electrode 15 is increased by 5%, and the film thickness of the third interlayer insulating film 14 is decreased by 5% is different from that in Example 1 in the visible light wavelength. Although the fluctuation range of the transmittance in the range is slightly large, each of the red wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm) is the same as in Example 1. Shows the peak of transmittance. The transmittance at the peak is almost the same.

  In comparison with Example 1, the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each 10% thicker, and the third interlayer insulating film 14 is 10% thinner. In the wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm), the transmittance peak is shown in each wavelength range. It is shifted to the long wavelength side. Similar to the case of the comparative example 4 in which the film thicknesses of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 are each reduced by 10%, when a short wavelength of 430 nm or less is cut and used, it is more than that of the first embodiment. Insufficient blue light intensity (light intensity) will occur.

  According to the spectral distributions of Examples 1 to 10 and Comparative Examples 1 to 6, in order to ensure high transmittance in the visible light wavelength range, the first electrode 16a made of an ITO film, the second electrode The film thickness of one of the electrode 16c and the pixel electrode 15 is set to a range of 140 nm ± 10%, the film thickness of the remaining electrode is set to a range of 140 nm ± 5%, and the third interlayer insulation made of silicon oxide The film thickness of the film 14 is preferably set in the range of 175 nm ± 10%. Further, the thickness of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 made of an ITO film is set in a range of 140 nm ± 5%, respectively, and the film of the third interlayer insulating film 14 made of silicon oxide More preferably, the thickness is set in the range of 175 nm ± 5%.

  In addition, the red wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm) in the present embodiment are not limited to this, for example, as an electronic device to be described later When the liquid crystal device 100 is used as the light modulation means (light valve) of the projection type display device (liquid crystal projector), it may be set according to the spectral distribution of red, green, and blue color light obtained from the light source. desirable. In addition, the color purity can be improved by narrowing the wavelength ranges of red, green, and blue color light from the wavelength ranges of light of the three primary colors generally shown. In other words, the film thicknesses of the first electrode 16a, the second electrode 16c, the pixel electrode 15, and the third interlayer insulating film 14 are set based on, for example, the first embodiment so that the transmittance peak occurs in each narrowed wavelength range. It may be managed so that it falls within a narrower range.

According to the embodiment described above, the following effects can be obtained.
(1) In the liquid crystal device 100, the film thickness of one of the first electrode 16a, the second electrode 16c, and the pixel electrode 15 made of an ITO film disposed in the opening region of the pixel P is in a range of 140 nm ± 10%. The thickness of the remaining electrode is in the range of 140 nm ± 5%, and the thickness of the third interlayer insulating film 14 made of silicon oxide is in the range of 175 nm ± 10%. Thereby, the spectral distribution of the light transmitted through the aperture region of the pixel P is transmitted in each of the red wavelength range (600 nm to 700 nm), the green wavelength range (500 nm to 600 nm), and the blue wavelength range (400 nm to 500 nm). Has a rate peak. Therefore, it is possible to provide the transmissive liquid crystal device 100 in which high transmittance is realized over the visible light wavelength range.
(2) In the liquid crystal device 100, the third interlayer insulating film 14 provided between the storage capacitor 16 and the pixel electrode 15 is stacked on the first silicon oxide film and the first silicon oxide film on the storage capacitor 16 side. And a second silicon oxide film doped with boron. As a result, the first silicon oxide film is covered with the second silicon oxide film doped with chemically more stable boron. Even if the pixel electrode 15 is formed using a photolithography method or the like after that, It is possible to avoid a problem that the third interlayer insulating film 14 is altered or etched to change the film thickness. That is, by using the third interlayer insulating film 14 having stable film quality and film thickness, as a result, high transmittance in the pixel P can be stably secured.

(Second Embodiment)
<Electronic equipment>
FIG. 12 is a schematic diagram illustrating a configuration of a projection display device as an electronic apparatus. As shown in FIG. 12, a projection display apparatus 1000 as an electronic apparatus according to this embodiment includes a polarization illumination apparatus 1100 arranged along the system optical axis L, and two dichroic mirrors 1104 and 1105 as light separation elements. Three reflection mirrors 1106, 1107, 1108, five relay lenses 1201, 1202, 1203, 1204, 1205, three transmissive liquid crystal light valves 1210, 1220, 1230 as light modulation means, and a light combining element As a cross dichroic prism 1206 and a projection lens 1207.

  The polarized light illumination device 1100 is generally configured by a lamp unit 1101 as a light source composed of a white light source such as an ultra-high pressure mercury lamp or a halogen lamp, an integrator lens 1102, and a polarization conversion element 1103.

  The dichroic mirror 1104 reflects red light (R) and transmits green light (G) and blue light (B) among the polarized light beams emitted from the polarization illumination device 1100. Another dichroic mirror 1105 reflects the green light (G) transmitted through the dichroic mirror 1104 and transmits the blue light (B).

The red light (R) reflected by the dichroic mirror 1104 is reflected by the reflection mirror 1106 and then enters the liquid crystal light valve 1210 via the relay lens 1205.
Green light (G) reflected by the dichroic mirror 1105 enters the liquid crystal light valve 1220 via the relay lens 1204.
The blue light (B) transmitted through the dichroic mirror 1105 enters the liquid crystal light valve 1230 via a light guide system including three relay lenses 1201, 1202, 1203 and two reflection mirrors 1107, 1108.

  The liquid crystal light valves 1210, 1220, and 1230 are disposed to face the incident surfaces of the cross dichroic prism 1206 for each color light. The color light incident on the liquid crystal light valves 1210, 1220, and 1230 is modulated based on video information (video signal) and emitted toward the cross dichroic prism 1206. In this prism, four right-angle prisms are bonded together, and a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a cross shape on the inner surface thereof. The three color lights are synthesized by these dielectric multilayer films, and the light representing the color image is synthesized. The synthesized light is projected on the screen 1300 by the projection lens 1207 which is a projection optical system, and the image is enlarged and displayed.

  The liquid crystal light valve 1210 is the one to which the liquid crystal device 100 of the first embodiment described above is applied. The liquid crystal device 100 is arranged with a gap between a pair of polarizing elements arranged in crossed Nicols on the incident side and the emission side of colored light. The same applies to the other liquid crystal light valves 1220 and 1230.

  According to such a projection display device 1000, the liquid crystal device 100 that can obtain high transmittances for red, green, and blue color light in the opening region of the pixel P is used as the liquid crystal light valves 1210, 1220, and 1230. Therefore, bright display quality is realized by effectively using the light emitted from the polarization illumination device 1100.

  In addition, the fact that a high transmittance can be obtained in the opening area of the pixel P means that the reflectance of light transmitted through the opening area is lowered. Then, the probability that the reflected light is transmitted again through the liquid crystal layer 50 is reduced. Therefore, when the liquid crystal device 100 is used as the liquid crystal light valves 1210, 1220, and 1230, the light resistance life (for example, the liquid crystal layer 50 and the alignment films 18 and 24). (Light degradation) is improved.

Of the polarized light beams emitted from the polarization illumination device 1100 as the light source, the pixel P is compared with the peak wavelength of the light intensity in the spectral distribution of red light (R), green light (G), and blue light (B). The film thicknesses and ranges of the first electrode 16a, the second electrode 16c, the pixel electrode 15, and the third interlayer insulating film 14 in the liquid crystal device 100 are set so that the peak wavelengths of the transmittance of light transmitted through And preferably used. According to this, the light utilization efficiency can be further enhanced. Note that “substantially match” refers to a state in which the peak of the transmittance of the color light transmitted through the pixel P appears in a wavelength range within ± 5% with respect to the peak wavelength of the light intensity of the color light emitted from the light source.
Further, for example, when the spectral distribution of blue light (B) is cut to 430 nm to 500 nm by cutting ultraviolet light having a wavelength shorter than 430 nm, and the light resistance lifetime of the liquid crystal device 100 is further improved, the transmittance falls within the wavelength range. The film thickness and the range of the first electrode 16a, the second electrode 16c, the pixel electrode 15, and the third interlayer insulating film 14 are set so that the peaks of the first and second electrodes 16a, 16c, and 15 are reached.

The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. Electronic equipment to which the liquid crystal device 100 is applied is also included in the technical scope of the present invention.
Various modifications other than the above embodiment are conceivable. Hereinafter, a modification will be described.

  (Modification 1) The first electrode 16a and the second electrode 16c, which are a pair of translucent electrodes of the storage capacitor 16, and the pixel electrode 15 are not limited to using an ITO film as a transparent conductive film. Zinc Oxide) may be used.

  (Modification 2) The third interlayer insulating film 14 as the interlayer insulating film of the present invention is not limited to a laminated body of the first silicon oxide film and the second silicon oxide film doped with boron, but silicon oxide. It may be a single layer of a film or a silicon oxynitride film.

  (Modification 3) The semiconductor layer 30a of the TFT 30 in the liquid crystal device 100 is not limited to be disposed so as to overlap the scanning line 3a. For example, the storage capacitor 16, the third interlayer insulating film 14, and the pixel electrode of the present application can be arranged even when the semiconductor layer 30a is bent in the middle and arranged so as to overlap the scanning line 3a and the data line 6a. Fifteen configurations can be applied.

  (Modification 4) The electro-optical device to which the present invention is applicable is not limited to the liquid crystal device 100. For example, in a bottom emission type organic EL (electroluminescence) device in which a functional layer including a light emitting layer and a cathode are provided on the pixel electrode 15 so that light emission is emitted to the element substrate 10 side where the pixel electrode 15 is provided. Can also be applied.

  (Modification 5) The electronic apparatus to which the liquid crystal device 100 is applied is not limited to the projection display device 1000 of the above embodiment. For example, projection-type HUD (head-up display), direct-view type HMD (head-mounted display), electronic book, personal computer, digital still camera, LCD TV, viewfinder type or monitor direct-view type video recorder, car navigation system It can be suitably used as a display unit of an information terminal device such as an electronic notebook or POS. In application, the peak of the transmittance of the light transmitted through the pixel P is at least with respect to the peak wavelengths of the light intensities of red, green, and blue in the spectral distribution of the light of the light source that illuminates the transmissive liquid crystal device 100. The thicknesses and ranges of the first electrode 16a, the second electrode 16c, the pixel electrode 15, and the third interlayer insulating film 14 are set and used so as to be suitable.

  DESCRIPTION OF SYMBOLS 10 ... Element board | substrate as a board | substrate, 14 ... 3rd interlayer insulation film as an interlayer insulation film, 15 ... Pixel electrode, 16 ... Storage capacitor, 16a ... 1st electrode of a pair of translucent electrodes, 16b ... Dielectric material Layer, 16c, second electrode of a pair of translucent electrodes, 100, a liquid crystal device as an electro-optical device, 1000, a projection display device as an electronic apparatus.

Claims (5)

A substrate,
A translucent pixel electrode disposed in the pixel;
A storage capacitor having a pair of translucent electrodes disposed opposite to each other with a dielectric layer between the substrate and the pixel electrode;
An interlayer insulating film between the storage capacitor and the pixel electrode;
The pixel electrode, the pair of translucent electrodes, and the interlayer insulation so that a spectral distribution of light transmitted through the pixel has a transmittance peak corresponding to at least each of the red, green, and blue wavelength ranges. An electro-optical device, wherein each film thickness is set.   The pixel electrode and the pair of translucent electrodes are made of an ITO film, and the film thickness of one of the ITO films is in the range of 140 nm ± 10%, and the film thickness of the remaining ITO film is 140 nm ± 2. The electro-optical device according to claim 1, wherein the electro-optic is in a range of 5%, the interlayer insulating film is made of a silicon oxide film, and the thickness of the silicon oxide film is in a range of 175 nm ± 10%. apparatus.   2. The interlayer insulating film includes: a first silicon oxide film on the storage capacitor side; and a second silicon oxide film laminated on the first silicon oxide film and doped with boron. 2. The electro-optical device according to 2.   An electronic apparatus comprising the electro-optical device according to claim 1. A light source for illuminating the electro-optical device;
At least the peak wavelength of the light intensity in each wavelength range of red, green, and blue in the light emitted from the light source, and at least each wavelength range of red, green, and blue in the spectral distribution of the light transmitted through the pixel of the electro-optical device. The electronic device according to claim 4, wherein the peak wavelength of the corresponding transmittance substantially matches.

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