# US 2021/0280405 A1 · Target Holder Assembly of Ion Probe and Method for Preparing Sample Target Thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280405 A1 - Document ID: US20210280405A1 - Status: Published application - Kind: A1 - Application number: 17/327,377 - Filed: 2021-05-21 - Published: 2021-09-09 - Earliest claimed: 2019-12-26 - Assignees: Institute of Geology and Geophysics Chinese Academy of Sciences (Iggcas) - Applicants: Institute of Geology and Geophysics Chinese Academy of Sciences (Iggcas) - Inventors: Jiao LI; Qiuli LI - Web page: https://patentgrep.com/patent/US20210280405A1 ## CPC - H01J 49/0409: {Sample holders or containers (containers for retaining a material to be analyzed, B01L3/50, for DNA, C12Q1/6834, for biological materials, G01N33/543)} - H01J 49/0031: {Step by step routines describing the use of the apparatus (H01J49/0081 takes precedence)} - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) ## Abstract Disclosed are a target holder assembly of an ion probe and a method for preparing a sample target thereof. Specifically, the target holder assembly includes a body and sheets, a middle part of the body is provided with a sample target hole, and limiting portions are symmetrically arranged at an opening of the sample target hole away from a sample target entry side; and the sheets match the limiting portions in shape and dimension to form recesses on a sample target for receiving the limiting portions. ## Claims ### Claim 1 A target holder assembly of an ion probe, comprising: a body and sheets, wherein a middle part of the body is provided with a sample target hole; limiting portions are symmetrically arranged at an opening of the sample target hole away from a sample target entry side; and the sheets match the limiting portions in shape and dimension to form recesses on a sample target for receiving the limiting portions; wherein the recesses match the sheets in depth and dimension, so that when the sample target is loaded into the body, the limiting portions can be clamped into the recesses formed by the sample target through the sheets. ### Claim 2 (depends on 1) The target holder assembly according to claim 1, wherein a number of the limiting portions is two. ### Claim 3 (depends on 1) The target holder assembly according to claim 1, wherein a number of the limiting portions is three or four. ### Claim 4 (depends on 1) The target holder assembly according to claim 1, wherein a length of the limiting portion along an extending direction of the sample target hole is 0.9 mm to 1.1 mm. ### Claim 5 (depends on 1) The target holder assembly according to claim 1, wherein a length of the limiting portion perpendicular to the extending direction of the sample target hole is 1.9 mm to 2.1 mm. ### Claim 6 (depends on 1) The target holder assembly according to claim 1, wherein the limiting portions are sector-shaped. ### Claim 7 (depends on 1) The target holder assembly according to claim 1, wherein the limiting portions are in shape of a trapezoid, a rectangle, or a zigzag shape. ### Claim 8 (depends on 1) The target holder assembly according to claim 1, wherein the body is further provided with a groove; the groove connects to a sampling rod. ### Claim 9 (depends on 1) The target holder assembly according to claim 1, wherein the body is further provided with a threaded hole; the threaded hole cooperates with a screw to fix the sample target. ### Claim 10 (depends on 1) The target holder assembly according to claim 1, wherein the body is integrally formed. ### Claim 11 (depends on 1) The target holder assembly according to claim 1, wherein the body is made of non-magnetic stainless steel. ### Claim 12 (depends on 11) The target holder assembly according to claim 11, wherein the body is made of 316 stainless steel with a Vickers hardness of 89. ### Claim 13 (depends on 1) The target holder assembly according to claim 1, wherein the sheets are made of 316 stainless steel with a Vickers hardness of 89. ### Claim 14 (depends on 1) The target holder assembly according to claim 1, wherein the surface of the body and the sheets are polished. ### Claim 15 (depends on 1) The target holder assembly according to claim 1, wherein the sample target hole is a cylinder with a diameter of 2.6 cm for placing the sample target therein. ### Claim 16 (depends on 1) A method for preparing a sample target applied to the target holder assembly according to claim 1, comprising: pasting samples, standard materials and the sheets to a flat double-sided tape, wherein the sheets are symmetrically arranged; pouring and curing resin, and removing the sheets to obtain a sample target blank with recesses; and polishing the sample target blank, cleaning the sample target blank and then plating the sample target blank with gold to obtain the sample target. ### Claim 17 (depends on 16) The method according to claim 16, wherein before the sheets are pasted, a release agent is applied to the sheets. ### Claim 18 (depends on 16) The method according to claim 16, wherein, polishing the sample target blank comprises: polishing the sample target blank with sandpaper, a diamond, and polishing paste until a half of sample particles are exposed. ### Claim 19 (depends on 16) The method according to claim 16, wherein, cleaning the sample target blank comprises: cleaning the sample target blank with high-purity alcohol and deionized water. ### Claim 20 (depends on 16) The method according to claim 16, further comprising: wiping the sheets with dust-free paper dipped in high-purity alcohol and drying the sheets before pasting the samples, the standard materials and the sheets to the flat double-sided tap.