Micro grating for transmissive electron microscope and its making process

A technology of transmission electron microscope and microgrid, which is applied in the manufacture of electrode system, the manufacture of discharge tube/lamp, circuit, etc., can solve the problems of low production efficiency, complicated manufacture of microgrid, poor thermal stability, etc., and achieve the effect of simple manufacture.

Inactive Publication Date: 2003-07-30
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical difficulties of existing microgrids such as complex fabrication, low production efficiency, poor thermal stability and easy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Microgrid for transmission electron microscope in the present embodiment, it is made by acetone, n-pentyl acetate and collodion, and its weight percentage is:

[0015] Acetone 1% n-Amyl Acetate 39% Collodion 60%.

[0016] The production method of above-mentioned transmission electron microscope microgrid is: it comprises the following steps:

[0017] 1) Firstly, 39% by weight of n-pentyl acetate and 60% of collodion are mixed for preparation, then 1% by weight of acetone is added to the above mixture, and made uniform to make n-pentyl acetate , a mixture of collodion and acetone;

[0018] 2) In a petri dish equipped with distilled water, drop one drop of the prepared mixed solution of n-pentyl acetate, collodion and acetone, and immediately place a copper mesh with a diameter of 3 mm on the liquid surface of the mixed solution;

[0019] 3) After 3 minutes, a layer of film is formed on the liquid surface of the petri dish, and the filter paper is placed flat on it and ...

Embodiment 2

[0023] Microgrid for transmission electron microscope in the present embodiment, it is made by acetone, n-pentyl acetate and collodion, and its weight percentage is:

[0024] Acetone 5% n-Amyl Acetate 55% Collodion 40%.

[0025] The production method of above-mentioned transmission electron microscope microgrid is: it comprises the following steps:

[0026] 1) First, 55% by weight of n-pentyl acetate and 40% of collodion are mixed for preparation, then 5% by weight of acetone is added to the above mixture, and made uniform to make n-pentyl acetate , a mixture of collodion and acetone;

[0027] 2) In a petri dish equipped with distilled water, drop one drop of the prepared mixed solution of n-pentyl acetate, collodion and acetone, and immediately place a copper mesh with a diameter of 3 mm on the liquid surface of the mixed solution;

[0028] 3) After 2 minutes, a layer of film is formed on the liquid surface of the petri dish, and the filter paper is placed flat on it and ge...

Embodiment 3

[0032] Microgrid for transmission electron microscope in the present embodiment, it is made by acetone, n-pentyl acetate and collodion, and its weight percent is:

[0033] Acetone 2% n-Amyl Acetate 60% Collodion 38%.

[0034] The production method of above-mentioned transmission electron microscope microgrid is: it comprises the following steps:

[0035] 1) First, 60% by weight of n-pentyl acetate and 38% of collodion are mixed and prepared, then 2% by weight of acetone is added to the above mixture and made uniform to make n-pentyl acetate , a mixture of collodion and acetone;

[0036] 2) In a petri dish equipped with distilled water, drop one drop of the prepared mixed solution of n-pentyl acetate, collodion and acetone, and immediately place a copper mesh with a diameter of 3 mm on the liquid surface of the mixed solution;

[0037] 3) After 4 minutes, a layer of film is formed on the liquid surface of the petri dish, and the filter paper is placed on it and gently pressed...

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Abstract

The present invention relates to a micro grating for transmissive electronic microscope and its making process and aims at simplifying its production process, raising production efficiency and heat stability. In the technological scheme, the micro grating is made with acetone, n-pentyl acetate and collodion. The production process includes mixing n-pentyl acetate and collodion and adding acetone to prepare mixed liquid; dropping one drop of the mixed liquid to culture dish and covering the liquid surface with copper net; spreading filter paper on the film formed on the liquid surface and lifting the filter paper with the copper net and film; cutting the film and setting fil mwith copper net into the sample chamber of transmissive electronic microscope; and applying high voltage to the microscope to form the micro grating.

Description

1. Technical field: [0001] The invention relates to a microgrid for a transmission electron microscope and a preparation method thereof, which belongs to a microgrid for a transmission electron microscope and a preparation method thereof. 2. Background technology: [0002] Astigmatism is caused by the non-circular inner hole of the electron microscope, the misalignment of the axes of the upper and lower pole pieces, the uneven material of the pole piece, and the local pollution around the pole piece hole. The non-rotational symmetry of the lens magnetic field will cause differences in its focusing ability in different directions, so that the imaging object point cannot be focused on the image plane after passing through the lens, which directly affects the resolution of the electron microscope. In order to solve this difficulty, people have developed a micro-grid to solve the astigmatism problem of the electron microscope. For example, the microgrid recorded in "Electron Mi...

Claims

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Application Information

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IPC IPC(8): H01J9/00H01J37/02H01J37/26
Inventor 李巧玲叶云
Owner ZHONGBEI UNIV
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