RU2491316C1 - Method of liquid crystal cell production - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to field of production of liquid crystal cells for liquid crystal cell devices, which can be widely used in different information systems. Method of producing liquid crystal cell with specified angle of liquid crystal orientation consists in application on substrata of electrode current-conducting boards of orientation substance in form of solution, which includes polyorganosiloxne, solvent and catalysis gamma-aminopropyltriethoxysilane with further removal of solvent and hardening in presence of catalyst, polyorganosiloxane, and after that, assembly of cells with placement between electrode current-conducting boards of liquid crystal. As polyorganosiloxane used is oligodialkyl alkyl hydride siloxane of general formula (A): (l) [R'₂Sio]_n[R"HSio]_m[R"'₃siO_0.5]_2' (a), where R', R", R'" = CH₃, C₂H₅, п = 4 - 8, m = 6 - 9, R', R" are different from each other. Microrelief, formed on substratum, has geometrical dimensions corresponding to geometrical dimensions of liquid crystal molecules and providing angle of surface orientation in the range from 0 to 90° depending on "m" and "n" values of polyorganosiloxane of formula (A).

EFFECT: invention ensures obtaining liquid crystal cells for liquid crystal devices with orientation of liquid crystal at definite specified angle.

3 cl, 4 dwg, 2 tbl, 7 ex

Description

The invention relates to the field of manufacturing liquid crystal cells for liquid crystal devices, which can be widely used in various information systems.

A known method of manufacturing a liquid crystal cell for liquid crystal devices (US Pat. Japan No. 57010118, 1982). The method consists in the fact that a thin layer of a composition containing a silane crosslinking agent with long chain alkyl groups, tetraalkyl titanate (or its polymer) and arylsiloxane is applied to plates with conductive electrodes between which a liquid crystal is placed, after which the cell is heated. When the cell is heated, the composition cures, as a result of which the liquid crystal placed between the electrodes acquires the ability of homeotropic (vertical) orientation. As an example, it is indicated that a thin layer of the composition is applied to the plates with electrodes, including hexadecyltriethoxysilane, tetrabutyl titanate and staircase phenylsiloxane in an organic solvent, and the cell is heated to 200 ° C to cure the composition and remove the solvent, while the liquid crystal becomes homeotropic orientation.

The disadvantages of the method are the high temperature of the cell heating for the formation of the orienting film, the multicomponent composition and the difficulty of obtaining some of its ingredients, the inability to maintain the mechanical and orienting properties of the films at a low temperature, the inability to obtain a predetermined angle on the surface of the orienting film.

A known method of manufacturing a liquid crystal cell (RF patent 2283338). According to this patent, selected as a prototype, a method of manufacturing a liquid crystal cell for liquid crystal devices consists in treating with a solution including polyorganosiloxane plates with conductive electrodes between which a liquid crystal is placed, followed by removal of the solvent and solidification of the polyorganosiloxane, taking oligoalkane as a polyorganosiloxane formulas

$${\left[R_2^{\mathrm{one}}SiO\right]}_m{\left[R^{2}HSiO\right]}_n{\left[R^{\mathrm{one}}{C}_8{H}_{17}SiO\right]}_p{\left[R^3{R}^{\mathrm{four}}{R}^{5}Si{O}_{0.5}\right]}_2,\left(I\right)$$

where R ¹ = CH ₃ , C ₂ H ₅ , R ² = CH ₃ , C ₂ H ₅ , R ³ = CH ₃ , C ₂ H ₅ , m = 5-7, n = 6-8, p = 0- 5, with the addition of a curing catalyst - γ-aminopropyltriethoxysilane in an amount of 3-5 wt.% Of the amount of oligoalkyridridsiloxane, while alkanes, their mixtures or aromatic hydrocarbons are taken as a solvent.

The spatial formula of oligoalkylhydridesiloxanes is presented below.

The disadvantage of this method is the possibility of obtaining only the homeotropic orientation of the liquid crystal due to the branched structure of the oligoalkylhydridosiloxane molecule and the inability to create a given molecular relief because of this.

The technical task of this invention is to obtain liquid crystal cells for liquid crystal devices with the orientation of the liquid crystal at a certain predetermined angle.

The technical result is achieved due to the fact that in the method of manufacturing a liquid crystal cell with a given angle of orientation of the liquid crystal, which consists in applying a layer of an orientant substance to the substrate of the conductive electrode boards in the form of a solution comprising polyorganosiloxane and a solvent, followed by removal of the solvent and curing in the presence of catalysis and curing in the presence of a catalyst, polyorganosiloxane, and then assembling the cells with liquid placed between the electrode conductive boards crystal, while oligodialkylalkylhydridesiloxane of the general formula is used as the polyorganosiloxane:

$$(I){\left[R_2^{\text{'}\text{'}}SiO\right]}_n{\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m{\left[R_3^{\text{'}\text{'}\text{'}\text{'}\text{'}\text{'}}Si{O}_{0.5}\right]}_2,(A)$$

where R ', R'',R''' = CH ₃ , C ₂ H ₅ , n = 4-8, m = 6-9,

moreover, R ', R' '- choose different from each other,

and the microrelief formed on the substrate has geometric dimensions corresponding to the geometric dimensions of the liquid crystal molecules and providing an angle of surface orientation in the range from 0 to 90 ° depending on the values of "m" and "n" of the organopolysiloxane of formula (A). The gamma aminopropyltriethoxysilane catalyst is taken in an amount of 3 wt.% Of the amount of oligodialkylalkylhydridesiloxane, and various materials are used as substrates - glass, metal, metal oxide, conductive coating, plastic.

A necessary condition for obtaining the orientation of the LC at a given angle is the presence of different substituents R 'and R' 'in the oligodialkylalkylhydridosiloxane molecule of formula (I), which is not performed in the prototype [1].

By varying the values of n and m in formula (I), the geometric parameters of the molecular microrelief are changed, bringing it into line with the geometric dimensions of the LC molecules.

The implementation of the invention

In the claimed method of manufacturing a liquid crystal cell with a given orientation angle of the liquid crystal, a substance is applied on the surface of the plates with conductive electrodes, an orientant in the form of a solution. The solution contains oligodialkylalkyl hydride siloxane and a heptane solvent. The solvent is then removed and cured in the presence of a catalyst, gamma-aminopropyltriethoxysilane. After this, the cells are assembled with placement of liquid crystal between the electrode conductive circuit boards. The general formula of oligodialkylalkylhydridesiloxane used in this technical solution

$${\left[R_2^{\text{'}\text{'}}SiO\right]}_n{\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m{\left[R_3^{\text{'}\text{'}\text{'}\text{'}\text{'}\text{'}}Si{O}_{0.5}\right]}_2,$$

Spatial formula

or

where R 'R'',R''' = CH ₃ , C ₂ H ₅ ,

moreover, R ', R' '- choose different from each other,

The value “m” and “n” are selected from the values n = 4-8, m = 6-9, and they are selected depending on the value of the orientation angle θ specified in the range from 0 to 90 ° by calculating the geometric parameters of the molecular microrelief of the substance - an orientant, namely, oligodialkylalkylhydridosilane, bringing it into line with the geometric dimensions of the liquid crystal molecules and the necessary orientation angle, while the orientation angle θ is calculated in accordance with the formula:

$$\theta =\frac{\pi }{2}+\frac{\mathrm{one}}{2}arctg\left[\frac{(\mathrm{one}-p)W_2\sin 2({\theta }_{\mathrm{one}}-{\theta }_2)}{(p-\mathrm{one})W_2\cos 2({\theta }_{\mathrm{one}}-{\theta }_2)-p{W}_{\mathrm{one}}}\right](B)$$

where p = L ₁ / L ₂ ,

молекулы по химической формуле (I),L ₁ - the length of the first section $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

molecules according to the chemical formula (I),

L ₂ - the length of the second section $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m,$$

ΔH is the difference in the heights of the first and second sections;

θ ₁ - the angle of orientation of the liquid crystal in the area $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n,$$

W ₁ - adhesion energy in the area $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n,$$

θ ₂ is the angle of orientation of the liquid crystal in the area $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m,$$

W ₂ - the energy of adhesion in the area $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m.$$

As the curing catalyst, gamma-aminopropyltriethoxysilane is used in an amount of 3% by weight of the amount of oligodialkylalkylhydridesiloxane.

Various substrates can be used as substrates - glass, metal, metal oxide, plastic, on which a conductive coating is applied.

LCD cells were manufactured for LCD displays using oligodialkylalkylhydride siloxane to orient LCs of different polarity with positive and negative dielectric anisotropy (Δε> 0 or Δε <0). Using the electro-optical method, the average values of the angle of inclination of the LCD inside the LCD cell were measured for them. By changing the transmittance of the LC cell placed between the crossed polarizers, depending on the applied voltage, the corresponding dependences of the phase delay difference for the extraordinary and ordinary beams were normalized to its maximum value achieved in the absence of voltage Ф = ΔФ (U) / ΔФ (U = 0) = ΔФ (U) / ΔФ. (I)

Where

ΔФ (U = 0) is the phase delay difference for the extraordinary and ordinary rays in the absence of voltage on the LCD cell,

ΔФ (U) is the difference in phase delay for the extraordinary and ordinary rays at a voltage on the LCD cell equal to U,

ΔФ _max is the maximum phase delay difference for the extraordinary and ordinary rays, achieved in cells with an ideal uniform orientation (the angle of inclination in the LCD cell in the absence of voltage is 0 for LC with Δε> 0 and 90 ° for LC with Δε <0).

Then, using formulas (II) and (III) below, using the known values of the refractive indices n _e and n _o and birefringence Δn for LC with Δε> 0 and Δε <0, respectively, the average values of the angle of inclination of the LCD inside the LC were calculated cells.

$${\theta }_0=\arccos {\left\{\frac{n_e^2}{n_e^2-n_o^2}\left[\mathrm{one}-{\left(\mathrm{one}+\frac{\Delta F\left(U=0\right)}{\Delta F_{\max }}\frac{\Delta n}{n_0}\right)}^{-2}\right]\right\}}^{\mathrm{one}/2}\left(II\right)$$

$${\theta }_0=\arccos {\left\{\frac{n_o^2}{n_o^2-n_e^2}\left[\mathrm{one}-{\left(\mathrm{one}-\frac{\Delta F\left(U=0\right)}{\Delta F_{\max }}\frac{\Delta n}{n_e}\right)}^{-2}\right]\right\}}^{\mathrm{one}/2}\left(III\right)$$

where n _e is the refractive index for an extraordinary ray,

n _o is the refractive index for an extraordinary ray,

Δn = n _e -n _o - birefringence,

Δε is the dielectric anisotropy.

Thus, according to formulas (II) and (III), the average values of the angle of inclination of the liquid crystal were calculated, then the LC inside the LC cells are shown in Tables 1 and 2.

Table 1 shows the values of the orientation angles of the liquid crystal material ZhK-440 with negative dielectric anisotropy Δε <0 on the films proposed by this technical solution based on oligodialkylalkyl hydridesiloxanes with different values of R ', R' ', R' '', "n" and "m ".

Table 1 R ' R '' R '' ' n m Angle Θ, ° CH ₃ C ₂ H ₅ CH ₃ 8 9 90 CH ₃ C ₂ H ₅ C ₂ H ₅ 8 9 85 CH ₃ C ₂ H ₅ CH ₃ 6 9 77 CH ₃ C ₂ H ₅ C ₂ H ₅ 6 9 66 C ₂ H ₅ CH ₃ CH ₃ four 9 56 C ₂ H ₅ CH ₃ C ₂ H ₅ 7 8 48 CH ₃ C ₂ H ₅ CH ₃ 7 8 40 CH ₃ C ₂ H ₅ C ₂ H ₅ 7 8 32 CH ₃ C ₂ H ₅ CH ₃ 5 7 22 CH ₃ C ₂ H ₅ C ₂ H ₅ 5 7 fourteen C ₂ H ₅ CH ₃ CH ₃ four 6 7 C ₂ H ₅ CH ₃ C ₂ H ₅ four 6 0

Table 2 shows the values of the orientation angles of the liquid crystal material ZhK-807 with positive dielectric anisotropy Δε> 0 on the films proposed by this technical solution based on oligodialkylalkyl hydridesiloxanes with different values of R ', R' ', R' '', "n" and "m ".

table 2 R ' R '' R '' ' n m Angle Θ, ° CH ₃ C ₂ H ₅ CH ₃ 7 9 0 CH ₃ C ₂ H ₅ C ₂ H ₅ 7 9 9 CH ₃ C ₂ H ₅ CH ₃ 6 9 17 CH ₃ C ₂ H ₅ C ₂ H ₅ 6 9 28 C ₂ H ₅ CH ₃ CH ₃ 5 8 40 C ₂ H ₅ CH ₃ C ₂ H ₅ 5 8 48 CH ₃ C ₂ H ₅ CH ₃ 7 7 55 CH ₃ C ₂ H ₅ C ₂ H ₅ 7 7 62 CH ₃ C ₂ H ₅ CH ₃ 5 6 71 CH ₃ C ₂ H ₅ C ₂ H ₅ 5 6 80 C ₂ H ₅ CH ₃ CH ₃ four 6 86 C ₂ H ₅ CH ₃ C ₂ H ₅ four 6 90

и [R''HSiO]_m, имеющими длину L₁ и L₂, соответственно, и разницу поперечного размера ΔH. Черточками показана ориентация ЖК молекул на участках поверхностного микрорельефа с углами ориентации θ₁ и θ₂ на участках молекулы по химической формуле (A) $${\left[R_2^{\text{'}}SiO\right]}_n$$

и $${\left[R^{\text{'}\text{'}}HSiO\right]}_m,$$

соответственно. Энергия сцепления на участках молекулы по химической формуле (A) $${\left[R_2^{\text{'}}SiO\right]}_n$$

и $${\left[R^{\text{'}\text{'}}HSiO\right]}_m$$

имеет величину W₁ и W₂, соответственно.To orient the LCD at a given angle, it is necessary to create a microrelief of the substrate, in which one way or another the liquid crystal (LCD) is placed. For illustration purposes, Fig. 1 schematically shows the surface microrelief of the substrate in the nanometer range with sections of the molecule by the chemical formula (A) $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

and [R''HSiO] _m having a length L ₁ and L ₂ , respectively, and a transverse dimension difference ΔH. The dashes show the orientation of the LC molecules in the regions of the surface microrelief with the orientation angles θ ₁ and θ ₂ in the regions of the molecule according to the chemical formula (A) $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

and $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m,$$

respectively. The energy of adhesion in the areas of the molecule by the chemical formula (A) $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

and $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m$$

has a value of W ₁ and W ₂ , respectively.

It is known from the articles [1, 2] that the variation of the angle of inclination in the LC cell can be obtained using a surface microrelief in the nanometer range with sections of length L ₁ and L ₂ , the difference in the transverse size ΔH (height of the surface microrelief); in the region L _{1, the} liquid crystal is oriented at an angle θ ₁ , while the adhesion energy is equal to W ₁ , and in the region L _{2, the} liquid crystal is oriented at an angle θ ₂ , while the adhesion energy is W ₂ . For clarity, the notation mentioned is shown in Fig. 1.

In this case, the average angle of inclination in the volume of the liquid crystal layer should be a predetermined value θ in the range from 0 to 90 °, determined by the expression

$$\theta =\frac{\pi }{2}+\frac{\mathrm{one}}{2}arctg\left[\frac{\left(\mathrm{one}-p\right)W_2\sin 2\left({\theta }_{\mathrm{one}}-{\theta }_2\right)}{\left(p-\mathrm{one}\right)W_2\cos 2\left({\theta }_{\mathrm{one}}-{\theta }_2\right)-p{W}_{\mathrm{one}}}\right]\left(B\right)$$

where p = L ₁ / L ₂ ,

L ₁ is the length of the first section,

L ₂ - the length of the second section,

ΔH is the difference in the heights of the first and second sections;

θ ₁ is the orientation angle of the liquid crystal in the area L ₁ ,

W ₁ - the energy of adhesion in the area L ₁ ,

θ ₂ is the angle of orientation of the liquid crystal in the area L ₂ ,

W ₂ - the energy of adhesion in the area L ₂ .

In section L _{2, the} liquid crystal is oriented at an angle θ ₂ , while the adhesion energy in section L ₂ is equal to W ₂ , p = L ₁ / L ₂ .

1. Yeung F.S.Y., Ho Y.L.J., Yuet Wing Li, Hoi Sing Kwok, Liquid Crystal Alignment Layer With Controllable Anchoring Energies // Journal of Display Technology, Volume: 4, Issue 1, p.24-27 (2008).

2. Fion S. Yeung, Jacob Y. Ho, Y.W. Li, F.C. Xie, Ophelia K. Tsui, P. Sheng, and H.S. Kwok, Variable liquid crystal pretilt angles by nanostructured surfaces // Appl. Phys. Lett. 88, 051910 (2006).

и $${\left[R^{\text{'}\text{'}}HSiO\right]}_m$$

и размеров заместителей R' и R'', а также концевых групп R''' формировался молекулярный микрорельеф с глубиной, соответствующей размеру молекул ориентируемого жидкого кристалла, а средний угол наклона в объеме слоя жидкого кристалла составлял бы заданную величину θ в диапазоне от 0 до 90°.These articles indicate the fame that the microrelief is obtained by precision etching the surface of the substrate of the LC cell. In the proposed method, fragments of a molecule of oligodialkylalkylhydridesiloxane are selected so that by choosing the length of the fragments of the molecule according to the chemical formula (A) $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

and $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m$$

and the sizes of the substituents R 'and R'', as well as the terminal groups R''', a molecular microrelief was formed with a depth corresponding to the size of the molecules of the oriented liquid crystal, and the average tilt angle in the volume of the liquid crystal layer would be a given value θ in the range from 0 to 90 °.

Example 1

1 g of oligodialkylalkylhydridesiloxane of the General formula

$${\left[R_2^{\text{'}\text{'}}SiO\right]}_n{\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m{\left[R_3^{\text{'}\text{'}\text{'}\text{'}\text{'}\text{'}}Si{O}_{0.5}\right]}_2,(A)$$

Where

R '= R''' = CH ₃ , R '' = C ₂ H ₅ , n = 4, m = 6,

dissolved with stirring at room temperature in 99 g of dried and distilled heptane. To the resulting 1 wt.% Solution was added 0.03 g of a gamma-aminopropyltriethoxysilane curing catalyst and stirring was continued for 10 minutes. The treatment of defatted substrates of glass, metal oxide or plastic is carried out by applying a working solution to a rotating substrate at room temperature. After the solution is distributed over the surface of the substrate, it is heated at a temperature of 120-125 ° C for 1 hour. After cooling the substrates, a cell with a gap of 10 μm is collected, its LC is filled.

Example 2. Under the conditions of example 1, a 1% solution of the compound of formula (A) is prepared, where R '= R''= CH ₃ , R''= C ₂ H ₅ , n = 8, m = 9. The substrates are processed and tested according to example 1.

Example 3. Under the conditions of example 1, a 1% solution of the compound of formula (A) is prepared, where R ′ = R ″ ″ = C ₂ H ₅ , R ″ = CH ₃ , n = 4, m = 6. The substrates are processed and tested according to example 1.

Example 4. Under the conditions of example 1, a 1% solution of the compound of formula (A) is prepared, where R ′ = R ″ ″ = C ₂ H ₅ , R ″ = CH ₃ , n = 8, m = 9. The substrates are processed and tested according to example 1.

Example 5. Under the conditions of example 1, a 1% solution of the compound of formula (A) is prepared, where R ′ = R ″ ″ = CH ₃ , R ″ = C ₂ H ₅ , n = 8, m = 9, the solvent is toluene. The substrates are processed and tested according to example 1.

Example 6. Under the conditions of Example 1, a 1% solution of the compound of formula (A) is prepared, where R ′ = R ″ ″ = CH ₃ , R ″ = C ₂ H ₅ , n = 3, m = 10. The substrates are processed and tested according to example 1.

Example 7. Under the conditions of Example 1, a 1% solution of the compound of formula (A) is prepared, where R ′ = R ″ ″ = CH ₃ , R ″ = C ₂ H ₅ , n = 4, m = 6, the solvent is hexane.

Below are examples of the orientation of the liquid crystal of the prototype and the claimed solution.

и $${\left[R^1{C}_8{H}_{17}SiO\right]}_p$$

из химической формулы (А) показаны в виде прямоугольных выступов разной высоты.Figure 2 shows the orientation of the liquid crystal molecule (shown as an ellipse) on the film of polyorganosiloxane according to the well-known solution (prototype). Fragments of polyorganosiloxane according to a known solution $${\left[R_2^{\mathrm{one}}SiO\right]}_m{\left[R^{2}HSiO\right]}_n$$

and $${\left[R^{\mathrm{one}}{C}_8{H}_{17}SiO\right]}_p$$

from the chemical formula (A) are shown in the form of rectangular protrusions of different heights.

и $${\left[R^{\text{'}\text{'}}HSiO\right]}_m$$

с разным значением n и m и разными заместителями R' и R'' с разными размерами. В результате формируется молекулярный микрорельеф с глубиной, соответствующей размеру молекул ориентируемого жидкого кристалла, а средний угол наклона в объеме слоя жидкого кристалла может изменяться в диапазоне от 0 до 90° и составлять заданную величину 6.Fig. 3, 4 shows the orientation of the liquid crystal on the film of oligodialkylalkylhydridosilane according to the proposed solution when using fragments of the molecule according to the chemical formula (A) $${\left[R_2^{\text{'}\text{'}}SiO\right]}_n$$

and $${\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m$$

with different values of n and m and different substituents R 'and R "with different sizes. As a result, a molecular microrelief is formed with a depth corresponding to the size of the molecules of the oriented liquid crystal, and the average tilt angle in the volume of the liquid crystal layer can vary in the range from 0 to 90 ° and amount to a predetermined value of 6.

As can be seen from the presented examples, tables and figures, the proposed method in comparison with the prototype method has significant advantages: it is simple to implement, you can create the desired orientation of the LCD, which is achieved by creating a molecular relief, you can apply an orientation coating on various types of substrates, which indicates to achieve a technical result.

The technical result is achieved by compounds of the chemical formula (A) by creating a given molecular surface of the film, which is achieved by selecting substituents of different lengths. Moreover, in order to obtain a uniform orientation from the polyorganosiloxane formula, the prototype excludes links of the formula [(CH ₃ ) (C ₈ H ₁₇ ) SiO] _p , which create an inhomogeneous molecular microrelief, as described above, and the oligodialkylalkyl hydride siloxane formula is used. Thus, the technical result is achieved.

Claims (3)

1. A method of manufacturing a liquid crystal cell with a given angle of orientation of the liquid crystal, which consists in applying a layer of an orientant substance to the substrate of the conductive circuit boards in the form of a solution comprising polyorganosiloxane, a solvent and a gamma-aminopropyltriethoxysilane catalyst, followed by removal of the solvent and curing in the presence and catalyst, polyorganosiloxane, and then the assembly of cells with the placement between the electrode conductive plates of the liquid crystal, characterized in that in quality polyorganosiloxane used oligodialkilalkilgidridsiloksan general formula (A):
$$(I){\left[R_2^{\text{'}\text{'}}SiO\right]}_n{\left[R^{\text{'}\text{'}\text{'}\text{'}}HSiO\right]}_m{\left[R_3^{\text{'}\text{'}\text{'}\text{'}\text{'}\text{'}}Si{O}_{0.5}\right]}_2,(A)$$

where R ', R'',R''' = CH ₃ , C ₂ H ₅ , n = 4-8, m = 6-9,
moreover, R ', R''- choose different from each other,
and the microrelief formed on the substrate has geometric dimensions corresponding to the geometric dimensions of the liquid crystal molecules and providing an angle of surface orientation in the range from 0 to 90 ° depending on the values of "m" and "n" of the organopolysiloxane of formula (A). 2. The method according to claim 1, characterized in that the gamma-aminopropyltriethoxysilane catalyst is taken in an amount of 3% by weight of the amount of oligodialkylalkylhydridesiloxane. 3. The method according to claim 1, characterized in that as the substrates use various materials - glass, metal, metal oxide, conductive coating, plastic.

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