JPH04113057U - contact angle measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to measure the contact angle of a droplet 12 dropped anywhere on a sample 11 that is larger than the stage surface. [Configuration] A reflector 10 is placed in the optical path outside the objective lens of the microscope 2.
A guide surface that slides on each other is provided between the microscope table and the base for fixing the microscope table, and a reflecting mirror moving mechanism 7 is provided so that the microscope table has the same optical axis and moves within the optical path, and the objective lens The distance between the droplet 12 and the droplet 12 is widened.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is based on the contact between the liquid surface and the solid surface at the location where the free surface of the stationary liquid touches the fixed wall. The present invention relates to a contact angle measuring device that measures antennae.

0002

[Conventional technology]

Figure 2 is a partially cutaway side view of a contact angle measuring device showing a conventional example, and Figure 3 is a direct reading of Figure 2. FIG. 3 is a diagram showing the inside of the field of view of a contact lens with a goniometer. Traditionally, this type of contact angle measurement As shown in Figure 2, the device places a sample 1 on which a droplet 12 of liquid is placed. a stage 3, a moving mechanism 4 that moves the stage 3 up and down, left and right, and back and forth; 5, 6, a box-shaped sample stage 9 that encloses the sample 11 containing the droplet 12 and the stage; A light source unit 8 that emits light onto the sample 11, and a light source unit 8 that emits light onto the sample 11 and the light that passes through the sample 11 surface and the droplet 12. A direct reading goniometer that receives light through a reflecting mirror 10a and observes the sample 11 and droplets 12. The microscope 2 has an eyepiece lens 1 with a tab.

0003 When measuring the contact angle of a chemical solution on a sample using this contact angle measuring device, please follow the steps below. It was done like this. First, cut a sample such as a wafer into a specified size and test it. Fill stage 3 of feed tray 9. Next, for example, a sample such as α-bromnaphthalene The liquid is dropped from the droplet opening of the sample stage 9 using a micropipette. Drop the sample solution Then, a droplet 12 is created. Next, stage 3 vertical and horizontal moving devices 5, 6 and The fine movement mechanism of the microscope 2 focuses on the droplet 12.

0004 Next, as shown in FIG. Move the movable scale dial as shown by the arrow to align with the interface of droplet 1. The tangent line and droplet that can be drawn by the movable scale at the point of contact between 2 and sample 11 12 and the interface between sample 11 is read.

[0005] In this way, by determining the contact angle between the test solution and the sample, the surface tension of the test solution with respect to the sample can be calculated. was calculated.

[0006]

[Problem that the idea aims to solve]

FIG. 4 is a diagram showing the optical path of the contact angle measuring device of FIG. 2. Conventional contact angle measurement mentioned above In the fixed device, the optical path is from the object when observing the droplet to the objective lens, as shown in Figure 4. The optical path length to the lens is l1+l2. Therefore, stage 3 samples with large external dimensions When the droplet 12 is dropped onto the material, the stage is moved so that the droplet 12 approaches the droplet 12a. You need to focus. However, as the stage moves, sample 1 1 also moves as shown by the two-dot chain line, collides with the reflecting mirror 10a, and focuses on the droplet 12. There is a problem that cannot be solved. In addition, as a countermeasure to this, the range of movement of the stage has been increased. This can be solved by listening, but the problem is that the device itself becomes larger.

[0007] The purpose of this invention is to provide a versatile contact angle measuring device in order to eliminate such drawbacks. It is to provide.

[0008]

[Means to solve the problem]

The contact angle measuring device of this invention has a stage on which the sample is placed, and a stage where a drop is placed on the stage. A microscope with a direct-reading goniometer is used to observe droplets, and a stage that can be moved from side to side and back and forth. a moving mechanism that moves the microscope, and a reflection mechanism that is fixedly placed in the optical path outside the objective lens of the microscope. In a contact angle measuring device having a reflecting mirror, the reflecting mirror is moved in the optical path direction without changing the optical axis. It is equipped with a reflector moving mechanism that moves the reflector.

[0009]

【Example】

Next, the present invention will be explained with reference to the drawings.

0010 FIG. 1 is a partially cutaway side view of a contact angle measuring device showing an embodiment of the present invention. this As shown in the figure, the contact angle measuring device is constructed by moving the microscope table on which the reflecting mirror 10a is fixed. This is because a reflecting mirror moving mechanism 7 is provided to move the reflecting mirror.

[0011] This reflector moving mechanism 7 is located on the base side and forms a groove, and is located on the underside of the microscope stage and forms a groove. A sliding protrusion is provided, a nut 14 is attached to this protrusion, and teeth are attached to this nut 14. An adjustment knob was attached to one end of the matching feed screw 13 and exposed from the base.

0012 Next, the operation of this contact angle measuring device will be explained. First, sample 11 is placed on stage 3. I'll ride it. Next, test the sample solution α-bromonaphthalene using a micropichet. It drips from the hole in the tray 9. Next, the end face of the sample 11 is moved under the microscope by the left-right moving mechanism 5. Move it to a position where it touches the mirror stand. Next, while looking through the microscope 2, remove the reverse mirror 10a. Move the microscope table attached to the camera and adjust the focus. At this time, the reflecting mirror 10a is 10 Since it comes to the position b, the sample 11 will not collide with the microscope table.

[0013] Although not shown in the drawing, this microscope table can be separated from the reflector mounting section, and this separation A guide mechanism that guides the separated parts vertically and a guide mechanism that guides the separated microscope parts vertically. If you provide a mechanism that can drive it, you can increase the distance between the microscope objective lens and the droplet. Therefore, it is possible to focus on a droplet dropped on a large sample.

[0014]

[Effect of the idea]

As explained above, the present invention uses a reflector located in the same optical path as the objective lens in the optical path. By providing a movement mechanism that moves the sample in the direction, it is possible to Even if the droplet is dropped at a misaligned location, the droplet can be moved within the focal range of the objective lens. This makes it possible to measure the contact angle between a sample larger than the stage surface and a droplet. This has the effect of providing an angle measuring device.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a contact angle measuring device showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a contact angle measuring device showing a conventional example.

FIG. 3 is a diagram showing the inside of the field of view of the contact lens with direct reading goniometer shown in FIG. 2;

FIG. 4 is a diagram showing an optical path of the contact angle measuring device of FIG. 2;

[Explanation of symbols]

1 Contact lens with direct reading goniometer 2 Microscope 3 stage 4 Back and forth movement mechanism 5 Left and right movement mechanism 6 Vertical movement mechanism 7 Reflector moving mechanism 8 Light source section 9 Sample stand 10a, 10b reflecting mirror 11 Sample 12, 12a droplet 13 Feed screw 14 Nut

Claims (1)

[Scope of utility model registration request] Claim 1: A stage on which a sample is placed, a microscope with a direct-reading goniometer for observing droplets dropped onto the stage, a movement mechanism for moving the stage left and right and back and forth, and a microscope equipped with a microscope equipped with a microscope equipped with a direct-reading goniometer for observing droplets dropped on the stage, a moving mechanism for moving the stage left and right and back and forth, and a microscope in the optical path outside the objective lens of the microscope. What is claimed is: 1. A contact angle measuring device having a reflecting mirror fixedly arranged therein, the contact angle measuring device comprising a reflecting mirror moving mechanism for moving the reflecting mirror in the optical path direction without changing the optical axis.