PPO / PPE chip packaging test tray material

Abstract

The invention relates to the technical field of high polymer materials, and discloses a PPO / PPE chip packaging test tray material. The PPO / PPE chip packaging test tray material is prepared from the following raw materials in parts by weight: 65 to 75 parts of polyphenyl ether, 12 to 16 parts of polystyrene, 7 to 12 parts of reinforcing filler, 5 to 8 parts of talcum powder, 1 to 3 parts of compatilizer, 0.1 to 0.3 part of antioxidant, 1 to 3 parts of coupling agent and 0.1 to 0.3 part of lubricant. The reinforcing filler is introduced into the material, so that the antistatic performance of a matrix is improved, the water absorption rate and the shrinkage rate of the material are reduced, and powder is not easy to fall off.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a PPO / PPE chip packaging test tray material. Background Technology

[0002] As semiconductor packaging technology advances towards higher density, miniaturization, and higher reliability, chip packaging test trays, as key fixtures for carrying, transporting, and testing chips, directly impact production yield and efficiency due to their material properties. During automated test sorting (ATE) and transportation, trays must withstand high-frequency mechanical insertion and removal, high-temperature testing environments, and potential electrostatic discharge (ESD) shocks. Therefore, ideal tray materials must simultaneously possess extremely low surface resistivity, extremely low water absorption, low coefficient of thermal expansion, low molding shrinkage, and good mechanical strength and heat resistance. Traditional plastics such as PC and PA, due to their high water absorption, poor dimensional stability, or insufficient heat resistance, are insufficient for high-end applications, driving the application of high-performance specialty engineering plastics in this field.

[0003] Polyphenylene oxide (PPO) resin, due to its inherent low water absorption, excellent dimensional stability, high heat resistance, and superior dielectric properties, has become the mainstream matrix material for high-end chip testing trays. To improve its processability, it is often blended with polystyrene or high-impact polystyrene. However, pure PPO / PS itself is an insulator with extremely high surface resistivity, failing to meet antistatic requirements. Current technologies generally impart conductivity by adding conductive fillers (such as carbon black, carbon fibers, and metal-coated fillers). However, the introduction of traditional fillers often brings a series of new problems: for example, achieving an effective conductive network requires a high filler content, which leads to a sharp increase in melt viscosity, processing difficulties, and a significant decrease in impact toughness; simultaneously, poor interfacial compatibility between the filler and the polymer matrix easily leads to increased warpage, difficulty in controlling shrinkage, and potential impact on long-term performance stability due to filler migration. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a PPO / PPE chip packaging test tray material.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A PPO / PPE chip packaging test tray material comprises the following raw materials in parts by weight: 65-75 parts polyphenylene ether, 12-16 parts polystyrene, 7-12 parts reinforcing filler, 5-8 parts talc, 1-3 parts compatibilizer, 0.1-0.3 parts antioxidant, 0.1-0.3 parts lubricant, and 1-3 parts coupling agent;

[0007] Preferably, the compatibilizer is one of SEBS-MAH or SBS-MAH;

[0008] Preferably, the antioxidant is antioxidant 1076;

[0009] Preferably, the lubricant is pentaerythritol tetrastearate;

[0010] Preferably, the coupling agent is one of a silane coupling agent or a titanate coupling agent;

[0011] Preferably, the tray material further includes pigment;

[0012] Preferably, the reinforcing filler has a core-shell structure, wherein the reinforcing filler is a halloysite nanotube as the core, and a first shell layer of polydopamine carbon layer is coated on the surface of the core layer, and then tin dioxide is coated on the surface of the first shell layer.

[0013] Furthermore, the reinforcing filler is prepared specifically by the following steps:

[0014] Step A1: Grind the halloysite nanotube raw ore into powder, disperse it in deionized water and ultrasonically disperse it evenly. Add sodium hexametaphosphate and stir for 5 hours. Let it stand for 12 hours to remove the bottom precipitate. Centrifuge the remaining mixture at low speed to remove the precipitate. Centrifuge the remaining liquid at medium speed to collect the precipitate. Wash it to obtain purified halloysite nanotubes.

[0015] Furthermore, in step A1, the mass ratio of halloysite nanotube ore, deionized water, and sodium hexametaphosphate is 50:200:1.25;

[0016] Furthermore, in step A1, the mixture is centrifuged at a speed of 800 rpm / min for 10 min.

[0017] Furthermore, in step A1, the remaining liquid is centrifuged at a speed of 2000 rpm / min for 15 min.

[0018] Step A2: Stir tris(hydroxymethyl)aminomethane in deionized water until homogeneous, then add purified halloysite nanotubes and sonicate for 30 min, then add dopamine hydrochloride and stir for 12 h, filter, wash and dry to obtain HNTs@PDA nanomaterials (haloysite nanotubes@polydopamine nanomaterials).

[0019] Furthermore, in step A2, the ratio of tris(hydroxymethyl)aminomethane, deionized water, purified halloysite nanotubes, and dopamine hydrochloride is 1.1-1.3 g: 200 mL: 1 g: 1.8-2.2 g;

[0020] Step A3: Dissolve tin tetrachloride pentahydrate in deionized water by stirring, and label it as solution 1; disperse HNTs@PDA nanomaterials evenly by ultrasonication in deionized water, and label it as solution 2; mix sodium hydroxide in deionized water by stirring, and label it as solution 3; heat solution 2 to 50-60℃ in a water bath, and then add solution 1 and solution 3 dropwise at the same rate while stirring continuously until the dropwise addition is complete. Adjust the pH of the system to 4, and continue the reaction for 20-40 minutes. Cool, collect the precipitate, wash, filter, dry, calcine, and grind to obtain the reinforcing filler.

[0021] Furthermore, in step A3, the ratio of tin tetrachloride pentahydrate to deionized water in solution 1 is 0.01-0.03 mol: 25-75 mL;

[0022] Furthermore, in step A3, the ratio of HNTs@PDA nanomaterials to deionized water in solution 2 is 10g:100mL;

[0023] Furthermore, in step A3, the ratio of sodium hydroxide to deionized water in solution 3 is 0.04-0.12 mol: 25-75 mL;

[0024] Furthermore, the dropping rate in step A3 is 0.5-1.5 mL / min;

[0025] Furthermore, in step A3, the calcination temperature is 500-700℃ and the calcination time is 1.5-2.5h.

[0026] The beneficial effects of this invention are:

[0027] The PPO / PPE chip packaging test tray material of the present invention is prepared by adding polyphenylene ether and polystyrene as the main matrix resins, and then adding reinforcing fillers, talc, compatibilizers, antioxidants, lubricants and coupling agents. The reinforcing fillers introduced into the material improve the antistatic properties of the matrix, reduce the water absorption and shrinkage rate of the material, and are not easy to shed powder.

[0028] The reinforcing filler in this invention is made by using halloysite nanotubes as the core, and then coating their surfaces with a polydopamine carbon layer and tin dioxide sequentially. After being dispersed in an insulating polymer matrix, the reinforcing filler forms a three-dimensional conductive network through mutual contact or tunneling effects. When the filler concentration reaches the percolation threshold, electrons can migrate rapidly through the filler network, significantly reducing the surface resistivity of the material and thus endowing the matrix with excellent antistatic properties. Among them, the natural tubular structure of halloysite nanotubes provides a high aspect ratio, which makes it easy to overlap with each other in the matrix, reducing the critical filler content required to form a conductive network. Polydopamine forms a carbon layer during subsequent calcination. The carbon layer formed after calcination has high conductivity and can act as a "bridge" for electron transport, enhancing the electrical coupling between halloysite and tin dioxide. The outermost tin dioxide shell layer, as an n-type semiconductor material, can provide free electrons on its surface, further promoting charge dissipation. The synergistic effect of the three can significantly reduce the surface resistivity of the material.

[0029] The introduction of reinforcing fillers in this invention also reduces the water absorption rate and shrinkage rate of the material. This is because after the fillers are dispersed in the matrix, they can extend the diffusion path of water molecules in the material, reduce the water penetration rate, and thus reduce the water absorption rate of the material. Furthermore, due to the rigid skeleton effect of the reinforcing fillers, the free shrinkage of molecular chains is restricted during polymer curing or cooling, and the overall shrinkage deformation is reduced through the physical cross-linking points, thereby reducing the shrinkage rate of the material. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: The reinforcing filler was prepared by the following steps:

[0032] Step A1: Grind 50g of halloysite nanotube ore into powder, disperse it in 200g of deionized water and ultrasonically disperse it evenly. Add 1.25g of sodium hexametaphosphate and stir for 5h. Let it stand for 12h to remove the bottom precipitate. Centrifuge the remaining mixture at 800rpm / min for 10min to remove the precipitate. Centrifuge the remaining liquid at 2000rpm / min for 15min, collect the precipitate, wash it, and you will get purified halloysite nanotubes.

[0033] Step A2: Stir 1.1g of tris(hydroxymethyl)aminomethane in 200mL of deionized water until homogeneous, then add 1g of purified halloysite nanotubes and sonicate for 30min, then add 1.8g of dopamine hydrochloride and stir for 12h. Filter, wash and dry to obtain HNTs@PDA nanomaterials.

[0034] Step A3: Dissolve 0.01 mol tin tetrachloride pentahydrate in 25 mL of deionized water and label it as solution 1; disperse 10 g HNTs@PDA nanomaterials evenly in 100 mL of deionized water using ultrasonication and label it as solution 2; mix 0.04 mol sodium hydroxide in 25 mL of deionized water and stir evenly and label it as solution 3; heat solution 2 to 50°C in a water bath, then simultaneously add solutions 1 and 3 dropwise at the same rate of 0.5 mL / min, stirring continuously until the addition is complete. Adjust the pH of the system to 4, continue the reaction for 20 min, cool, collect the precipitate, wash, filter, dry, and then calcine at 500°C for 1.5 h. Grind to obtain the reinforcing filler.

[0035] Example 2: The reinforcing filler was prepared by the following steps:

[0036] Step A1: Grind 50g of halloysite nanotube ore into powder, disperse it in 200g of deionized water and ultrasonically disperse it evenly. Add 1.25g of sodium hexametaphosphate and stir for 5h. Let it stand for 12h to remove the bottom precipitate. Centrifuge the remaining mixture at 800rpm / min for 10min to remove the precipitate. Centrifuge the remaining liquid at 2000rpm / min for 15min, collect the precipitate, wash it, and you will get purified halloysite nanotubes.

[0037] Step A2: Stir 1.2g of tris(hydroxymethyl)aminomethane in 200mL of deionized water until homogeneous, then add 1g of purified halloysite nanotubes and sonicate for 30min, then add 2g of dopamine hydrochloride and stir for 12h. Filter, wash and dry to obtain HNTs@PDA nanomaterials.

[0038] Step A3: Dissolve 0.02 mol tin tetrachloride pentahydrate in 50 mL deionized water and label it as solution 1; disperse 10 g HNTs@PDA nanomaterials evenly in 100 mL deionized water using ultrasonication and label it as solution 2; mix 0.08 mol sodium hydroxide in 50 mL deionized water and stir evenly and label it as solution 3; heat solution 2 to 55°C in a water bath, then simultaneously add solutions 1 and 3 dropwise at the same rate of 1 mL / min, stirring continuously until the addition is complete. Adjust the pH of the system to 4, continue the reaction for 30 min, cool, collect the precipitate, wash, filter, dry, and then calcine at 600°C for 2 h. Grind to obtain the reinforcing filler.

[0039] Example 3: The reinforcing filler was prepared by the following steps:

[0040] Step A1: Grind 50g of halloysite nanotube ore into powder, disperse it in 200g of deionized water and ultrasonically disperse it evenly. Add 1.25g of sodium hexametaphosphate and stir for 5h. Let it stand for 12h to remove the bottom precipitate. Centrifuge the remaining mixture at 800rpm / min for 10min to remove the precipitate. Centrifuge the remaining liquid at 2000rpm / min for 15min, collect the precipitate, wash it, and you will get purified halloysite nanotubes.

[0041] Step A2: Stir 1.3g of tris(hydroxymethyl)aminomethane in 200mL of deionized water until homogeneous, then add 1g of purified halloysite nanotubes and sonicate for 30min, then add 2.2g of dopamine hydrochloride and stir for 12h. Filter, wash and dry to obtain HNTs@PDA nanomaterials.

[0042] Step A3: Dissolve 0.03 mol tin tetrachloride pentahydrate in 75 mL deionized water and label it as solution 1; disperse 10 g HNTs@PDA nanomaterials evenly in 100 mL deionized water using ultrasonication and label it as solution 2; mix 0.12 mol sodium hydroxide in 75 mL deionized water and stir evenly and label it as solution 3; heat solution 2 to 60 °C in a water bath, then simultaneously add solutions 1 and 3 dropwise at the same rate of 1.5 mL / min, stirring continuously until the addition is complete. Adjust the pH of the system to 4, continue the reaction for 40 min, cool, collect the precipitate, wash, filter, dry, and then calcine at 700 °C for 2.5 h. Grind to obtain the reinforcing filler.

[0043] Example 4: A PPO / PPE chip packaging test tray material, comprising the following raw materials in parts by weight: 65 parts polyphenylene ether, 12 parts polystyrene, 7 parts reinforcing filler prepared in Example 1, 5 parts talc, 1 part SEBS-MAH, 0.1 parts antioxidant 1076, 0.1 parts pentaerythritol tetrastearate, 1 part silane coupling agent, and 1 part titanium dioxide;

[0044] Weigh the above raw materials according to the weight proportions, add each component raw material to a high-speed mixer for premixing for 5 minutes, and then put it into a twin-screw extruder. After co-extrusion, stretching, cooling and pelletizing, PPO / PPE chip packaging test tray material is obtained.

[0045] Example 5: A PPO / PPE chip packaging test tray material, comprising the following raw materials in parts by weight: 70 parts polyphenylene ether, 14 parts polystyrene, 10 parts reinforcing filler prepared in Example 2, 6.5 parts talc, 2 parts SBS-MAH, 0.2 parts antioxidant 1076, 0.2 parts pentaerythritol tetrastearate, 2 parts titanate coupling agent, and 1 part titanium dioxide;

[0046] Weigh the above raw materials according to the weight proportions, add each component raw material to a high-speed mixer for premixing for 5 minutes, and then put it into a twin-screw extruder. After co-extrusion, stretching, cooling and pelletizing, PPO / PPE chip packaging test tray material is obtained.

[0047] Example 6: A PPO / PPE chip packaging test tray material, comprising the following raw materials in parts by weight: 75 parts polyphenylene ether, 16 parts polystyrene, 12 parts reinforcing filler prepared in Example 3, 8 parts talc, 3 parts SEBS-MAH, 0.3 parts antioxidant 1076, 0.3 parts pentaerythritol tetrastearate, 3 parts silane coupling agent, and 1 part titanium dioxide;

[0048] Weigh the above raw materials according to the weight proportions, add each component raw material to a high-speed mixer for premixing for 5 minutes, and then put it into a twin-screw extruder. After co-extrusion, stretching, cooling and pelletizing, PPO / PPE chip packaging test tray material is obtained.

[0049] Comparative Example 1: This comparative example is a PPO / PPE chip packaging test tray material. The difference from Example 6 is that carbon nanotubes are used instead of the reinforcing filler prepared in Example 3. All other aspects are the same.

[0050] Comparative Example 2: This comparative example is a PPO / PPE chip packaging test tray material. The difference from Example 6 is that tin dioxide is used instead of the reinforcing filler prepared in Example 3. All other aspects are the same.

[0051] Comparative Example 3: This comparative example is a PPO / PPE chip packaging test tray material. The difference from Example 6 is that halloysite nanotubes are used instead of the reinforcing filler prepared in Example 3. All other aspects are the same.

[0052] Comparative Example 4: This comparative example is a PPO / PPE chip packaging test tray material. The difference between this example and Example 6 is that the reinforcing filler prepared in Example 3 was not added. All other aspects are the same.

[0053] The performance of the PPO / PPE chip packaging test tray materials prepared in Examples 4-6 and Comparative Examples 1-4 were tested:

[0054] Surface resistivity test: The surface resistivity of the tray material was tested according to ASTM D257-07 standard;

[0055] Water absorption rate test: Tested according to GB / T 1034-2008 "Determination of water absorption of plastics" standard;

[0056] Shrinkage test: The shrinkage rate of the pallet material was tested according to ASTM D955 standard;

[0057] Appearance test: Visually inspect whether the material surface does not shed powder;

[0058] The test results are shown in Table 1:

[0059] Table 1: Performance Test Results

[0060]

[0061] As can be seen from Table 1, the tray material prepared by the present invention has low surface resistivity, water absorption rate, and shrinkage rate, and does not shed powder. Therefore, it has good application prospects in the tray material of chip packaging and testing.

[0062] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the inventive concept, they should all fall within the protection scope of the present invention.

Claims

1. A PPO / PPE chip packaging test tray material, characterized in that, The raw materials include the following parts by weight: 65-75 parts polyphenylene ether, 12-16 parts polystyrene, 7-12 parts reinforcing filler, 5-8 parts talc, 1-3 parts compatibilizer, 0.1-0.3 parts antioxidant, 1-3 parts coupling agent, and 0.1-0.3 parts lubricant. The reinforcing filler has a core-shell structure, which uses halloysite nanotubes as the core, and then coats the core layer with a first shell layer of polydopamine carbon, and then coats the first shell layer with tin dioxide.

2. The PPO / PPE chip packaging test tray material according to claim 1, characterized in that, The reinforcing filler is prepared by the following steps: Step A1: Grind the halloysite nanotube raw ore into powder, disperse it in deionized water and ultrasonically disperse it evenly. Add sodium hexametaphosphate and stir for 5 hours. Let it stand for 12 hours to remove the bottom precipitate. Centrifuge the remaining mixture at low speed to remove the precipitate. Centrifuge the remaining liquid at medium speed to collect the precipitate. Wash it to obtain purified halloysite nanotubes. Step A2: Stir tris(hydroxymethyl)aminomethane in deionized water until homogeneous, then add purified halloysite nanotubes and sonicate for 30 min, then add dopamine hydrochloride and stir for 12 h, filter, wash and dry to obtain HNTs@PDA nanomaterials. Step A3: Dissolve tin tetrachloride pentahydrate in deionized water by stirring, and record as solution 1; disperse HNTs@PDA nanomaterials evenly by ultrasonication in deionized water, and record as solution 2; mix sodium hydroxide in deionized water by stirring evenly, and record as solution 3; Heat solution 2 in a water bath to 50-60℃, then add solution 1 and solution 3 dropwise at the same rate, stirring continuously until the addition is complete. Adjust the pH of the system to 4, and continue the reaction for 20-40 minutes. Cool, collect the precipitate, wash, filter, dry, calcine, and grind to obtain the reinforcing filler.

3. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A1, the mass ratio of halloysite nanotube ore, deionized water, and sodium hexametaphosphate is 50:200:1.

25.

4. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A1, the mixture is centrifuged at a low speed of 800 rpm / min for 10 min; the remaining liquid is centrifuged at a medium speed of 2000 rpm / min for 15 min.

5. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A2, the ratio of tris(hydroxymethyl)aminomethane, deionized water, purified halloysite nanotubes, and dopamine hydrochloride is 1.1-1.3g:200mL:1g:1.8-2.2g.

6. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A3, the ratio of tin tetrachloride pentahydrate to deionized water in solution 1 is 0.01-0.03 mol: 25-75 mL; the ratio of HNTs@PDA nanomaterials to deionized water in solution 2 is 10 g: 100 mL; and the ratio of sodium hydroxide to deionized water in solution 3 is 0.04-0.12 mol: 25-75 mL.

7. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A3, the dropping rate is 0.5-1.5 mL / min.

8. The PPO / PPE chip packaging test tray material according to claim 2, characterized in that, In step A3, the calcination temperature is 500-700℃ and the calcination time is 1.5-2.5h.

9. A PPO / PPE chip packaging test tray material according to claim 1, characterized in that, The compatibilizer is one of SEBS-MAH or SBS-MAH; the antioxidant is antioxidant 1076; the lubricant is pentaerythritol tetrastearate; the coupling agent is one of silane coupling agent or titanate coupling agent; the tray material also includes pigments.

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