Basic Properties and Application Examples of PGS Graphite Sheet PGS - PowerPoint PPT Presentation

Basic Properties and Application Examples of PGS Graphite Sheet PGS Graphite Sheet PGS Graphite Sheet 1. Basic properties of PGS Graphite sheet 2. Functions of PGS Graphite sheet 3. Application Examples Presentation

PGS Graphite Sheet PGS Graphite Sheet PGS Graphite Sheet PGS ( Pyrolytic Highly Oriented Graphite Sheet ) is made of graphite with a structure that is close to a single crystal, which is achieved by the heat decomposition of polymeric film. PGS is a competitive conductive sheet with high thermal conductivity and high flexibility. High heat conductivity: Each material has high heat conductivity. PGS Graphite Sheet:C99.9% or more Diamond 1750W/mK NEW NEW PGS 17 µm 1600W/mK PGS 25 µm 1000W/mK PGS 70 µm 700W/mK PGS 100 µm Pure Copper Aluminum Magnesium alloy Stainless steel [Layered Structure ] 3.354~3.356 Heat-Conductive sheet x 10 -8 cm 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Thermal Conductivity W/(m・K) c axis Flexibility: PGS is bending-resistant due to its flexibility. PGS can be used for areas such as curved surfaces and corners because its heat conductivity will remain unchanged in the absence of folds in PGS. a-b plane

Flexibility of PGS Graphite Sheet PGS Graphite Sheet PGS Graphite Sheet [Bending Test] [Bending Limitation] Bending Radius( R ) The sheet is fixed < 0.98N > R =2(mm) R =5(mm) Bending Angle PGS Graphite Sheet 10,000 cycls 100,000 cycls 90 degrees or more or more Bend Radius: R 3,000 cycls 30,000 cycls 180 degrees or more or more Bending Angle 180 degrees Flexibility: PGS is bending-resistant due to its flexibility. PGS can be used for areas such as curved 90 degrees surfaces and corners because its heat conductivity will remain unchanged in the absence of folds in PGS.

Material Characteristics of Graphite Sheets PGS Graphite Sheet PGS Graphite Sheet NEW NEW 17 μ m 25 μ m 70 μ m 100 μ m 0.017 ± 0.005 0.025 ± 0.010 0.070 ± 0.015 0.100 ± 0.030 Thikness (mm) Thermal X,Ydirection 1750 1600 1000 700 Conductivity Z direction 15 15 15 15 (W/(mK)) 9 to 10 9 to 10 9 to 10 9 to 10 Thermal diffusivity(cm 2 /s) (0.0009 ～ 0.001 m 2 /s) (0.0009 ～ 0.001 m 2 /s) (0.0009 ～ 0.001 m 2 /s) (0.0009 ～ 0.001 m 2 /s) 2.10 1.90 1.21 0.85 Density (g/cm 3 ) (2100 kg/m 3 ) (1900 kg/m 3 ) (1210 kg/m 3 ) (850 kg/m 3 ) 0.85 0.85 0.85 0.85 Specific Heat (50 ℃ )(J/gK) (850 J/kgK) (850 J/kgK) (850 J/kgK) (850 J/kgK) Heat resistance ( ℃ ) 400 400 400 400 Extensional X,Ydirection 40 30 22 19.6 strength Z direction 0.1 0.1 0.4 0.4 (MPa) Bending test (times) 30,000 or more 30,000 or more 30,000 or more 30,000 or more (R5/180 ﾟ ) Electric Conductivity 20000 20000 10000 10000 (2.0 × 10 6 S/m) (2.0 × 10 6 S/m) (1.0 × 10 6 S/m) (1.0 × 10 6 S/m) ( S/cm)

Applications of PGS Graphite Sheet (two functions) PGS Graphite Sheet PGS Graphite Sheet 1)Thermal Transfer 1)Thermal Transfer PGS Graphite sheet Carrying the heat PGS Graphite sheet A B Heat source (MPUs, PAs, Graphic chips, etc) Diffusing the heat B B Heat sink Heat source A B B 2)Thermal Interface 2)Thermal Interface Heat sink Heat sink Decreasing the thermal resistance PGS Graphite sheet and diffusing the heat Package PGS Graphite sheet Heat source B Without PGS With PGS Package The peak temperature drops Surface temperature of the package A

Application Example of PGS Graphite Sheet (Transfer) PGS Graphite Sheet PGS Graphite Sheet ■ Inspection 1 The heat transfer was monitored with thermograph after the heater was attached to the lower part of PGS, Copper and Aluminum. «Heat conductivity when the heater was on.» « Cooling state when the heater was turned on during the heat balance state» Size;18x180x0.1mm After 20 seconds After 10 seconds PGS Cu Al PGS Cu Al PGS Cu Al ·PGS Graphite Sheet carries the heat ·PGS Graphite sheet has high cooling Resistance heater 10x10mm Applied voltage 8V (appro.12W) effect . rapidly due to high heat conductivity

Application of PGS Graphite Sheet (Transfer) PGS Graphite Sheet PGS Graphite Sheet ■ Inspection 2 The heat transfer was monitored with thermograph after the heater was attached to the center part of PGS, Copper and Aluminum. [Measuring method] Heater size 10 × 10mm Resistance Heater Sample size(heat sink) Electric power 12W 90 × 90 × 0.3mm *The surface of the samples and the heater was Ambient Temperature:25 deg.C subjected to black oxide treatment. After 30 minutes Aluminum Copper PGS Graphite Sheet · The temperature of the heater reveals that PGS Graphite Sheet carried the heat, keeping the heat temperature lowest among the three materials. · The low temperature of PGS surface shows that PGS has high heat dissipation.

Thermal Resistance of PGS Graphite Sheet ( Ｉｎｔｅｒｆａｃｅ ) PGS Graphite Sheet PGS Graphite Sheet ■ Thermal resistance property Thermal resistance represents the degree of non-conductivity of the heat. Materials with lower thermal resistance are a more efficient conductor of heat (Thermal resistance depends on hardness of, and surface condition of material as well as heat conductivity.) Thermal resistance [Measuring Method] The sample is placed and fixed 1.0 between the transistor and the fin to measure temperature difference, Thermal resistance (deg C, cm 2 /W) from which the thermal resistance is calculated. Silicon Sheet Thermal resistance 0.8 0.3 mm Rth = (T1-T2) / W ( deg.C/W ) Transistor Competitor’s Graphite 0.6 1.5x2cm=3cm 2 0.07mm P =approx. 7W PGS 0.1mm Transistor 0.4 Temperature PGS 0.07mm 7w of the transistor T1 PGS 0.025mm Sample 0.2 15x20mm Silicon Grease 0.0 Temperature of the fin 0 2 4 6 8 10 12 T2 Pressure(kg/cm 2 ) Heat sink fin 150x20mm PGS has low thermal resistance due to its high conductivity and flexibility.

Shield Effect of PGS Graphite Sheet PGS Graphite Sheet PGS Graphite Sheet Shielding Effectiveness Test (KEC Method) 140 130 Shield Effect (dB)=-20log(Vs/V0) Shield Effect for Electric Field 120 110 100 Shield Effect (dB) 90 80 70 60 50 Shield Effect for Magnetic Field 40 30 20 10 0 10 100 1000 10000 Frequency (MHz)

PGS Graphite Sheet Application Development ( Standard series) PGS Graphite Sheet PGS Graphite Sheet ■ Standard series ( PGS 100, 70, 25 μm ) Type PGS Only Adhesive Type Laminated type （ Insulation & Adhesive ） S type A - A type A - M type A - PA type A - PM type A – SM type Polyester tape Polyester tape Polyester tape Front face ---------- ---------- ---------- standard type 30μm standard type 30μm thin type 10μm Insulative adhesion type Insulative thin Insulative adhesion type Insulative thin Insulative thin ---------- Rear face 30μm adhesion type 10μm 30μm adhesion type 10μm adhesion type 10μm Polyester (PET) Polyester (PET) Polyester (PET) ＰＧＳ Ⓡ ＰＧＳ Ⓡ ＰＧＳ Ⓡ ＰＧＳ Ⓡ tape 30μm ＰＧＳ Ⓡ tape 30μm tape 10μm ＰＧＳ Ⓡ Graphite sheet Graphite sheet Graphite sheet Graphite sheet Graphite sheet Graphite sheet Structure Acrylic Acrylic Acrylic Acrylic Acrylic Separating Separating Adhesive tape Separating Separating Separating Adhesive tape Adhesive tape Adhesive tape Adhesive tape paper paper 1 0 μ m 30 μ m paper paper paper 1 0 μ m 30 μ m 1 0 μ m � With insulation material � With insulation material � With insulation material � With insulation material � High Thermal Conductivity � With insulation material on one side on one side on both side on both side High Flexibility on both side � With strong adhesive � Low thermal resistance � Withstanding Voltage � Withstanding Voltage Features � Low Thermal Resistance � Withstanding Voltage tape for putting chassis comparison with A-A type PET tape ： 4 kV PET tape ： 4 kV � Available up to 400℃ PET Tape ： 1 kV � Withstanding Voltage � Withstanding Voltage Adhesive Tape ： 2 kV Adhesive Tape ： 1 kV � Conductive Material Adhesive Tape ： 1kV ： 2 kV ： 1 kV 400 ℃ 100 ℃ 100 ℃ 100 ℃ 100 ℃ 100 ℃ Withstand temp Standard Size 115×180 mm 90×115 mm 90×115 mm 90×115 mm 90×115 mm 90×115 mm 180×230 mm 115×180 mm 115×180 mm 115×180 mm 115×180 mm 115×180 mm Max. Size 115×180 mm （25μｍ） EYGS121810 ---------- ---------- ---------- ---------- ---------- 100 Part No. 100 μｍ ---------- ---------- ---------- ---------- ---------- Thickness μｍ Part No. EYGS121807 EYGA091207A EYGA091207M EYGA091207PA EYGA091207PM EYGA091207SM 70 70 μｍ 100 μｍ 80 μｍ 130 μm 110 μm 90 μm Thickness μｍ Part No. EYGS121803 EYGA091203A EYGA091203M EYGA091203PA EYGA091203PM EYGA091203SM 25 25 μｍ 55 μｍ 35 μｍ 85 μm 65 μm 45 μm μｍ Thickness