정전기방전 제어 엔지니어시험 번역(영어 원본)28. Which of the following tests is most suitable to determining latent failure to static devices?
(A) Functionality test
(B) Reverse gate leakage mode test
(C) Bed-of-nails test
(D) Discrete component test
29. Which method listed below is the safest method to discharge a charged IC through direct physical contact?
(A) Use metal tweezers to clip to the IC pin.
(B) Use metal tweezers that are wired to ground to clip the IC pin.
(C) Use metal tweezers that are grounded to a 1 MegaOhm resistor to clip to the IC pin.
(D) Use grounded tweezers with static dissipative tips to 1.0E+06 to 1.0E+09Ω to clip the IC pin.
30. When testing ESD shielding bags, the horizontal time scale on an oscilloscope should be to
(A) 52 ns
(B) 100 ns
(C) 200 ns
(D) 500 ns
31. Which of the following test fixtures should be used when conducting laboratory evaluation of ESD safe polymer, packaging items with irregularly shaped surfaces?
(A) Concentric ring
(B) Parallel bar electrode
(C) Two 5-lb electrodes
(D) Two-point resistance measurement probe
32. How many cleaning cycle times should static control garments be processed through before evaluation?
(A) One
(B) Two
(C) Three
(D) Four
33. How long should ESD footwear be worn before testing or measuring voltage generation of floor materials in combination with a person?
(A) 3 minutes
(B) 5 minutes
(C) 10 minutes
(D) 15 minutes
34. When measuring the resistance of an uninstalled work surface, the support surface should be a surface that has a point to point resistance
(A) greater than 1.0 x 1012 ohms
(B) greater than 1.0 x 1011 ohms
(C) in the range of 1.0 x 104 ohms to 1.0 x 1011 ohms
(D) in the range of 1.0 x 105 ohms to 1.0 x 1011 ohms
35. For a footwear resistive characterization test, ESD footwear must be placed in an environmental chamber preset to 12% (±3%) relative humidity and 23 °C (±3 °C) for at least
(A) 72 hours
(B) 48 hours
(C) 24 hours
(D) 12 hours
36. Which of the following types of material has the most natural negative charges?
(A) Glass
(B) Paper
(C) Cotton
(D) Teflon
37. According to JESD72:2001, what are defined as polymeric materials that are used in film form to act as either interlayer dielectrics, passivation layers, or circuit support films?
(A) Conductive materials
(B) Substrates
(C) Film capacitors
(D) Film dielectrics
38. What is the minimum specimen size for surface resistive measurement of static dissipative planar materials?
(A) 2.0 x 4.0 inches
(B) 3.0 x 5.0 inches
(C) 3.0 x 6.0 inches
(D) 12 x 24 inches
39. What is defined as that property which permits the storage of electrically separated charges when potential differences exist between conductors?
(A) Voltage
(B) Current
(C) Capacitance
(D) Impedance
40. How much field strength is needed for a negative ion to drift 10 meters per second?
(A) 55.6 V/m
(B) 55.6 kV/m
(C) 71.4 kV/m
(D) 76.9 kV/m
41. What is the magnitude of the electrical field 1 cm away from a 1 nC point charge?
(A) 9 kV/m
(B) 19 kV/m
(C) 90 kV/m
(D) 1.9 kV/m
42. What is the key advantage of cantilevered diode string as compared to a diode chain consisting of cascaded diodes?
(A) Low leakage currents at extended high temperatures.
(B) Fast turn-on voltage during ESD stress.
(C) More compact and smaller layout size.
(D) Used in more advanced fabrication process technologies.
43. When two objects are rubbed together, object A becomes positively charged and object B becomes negatively charged. Which of the following statements is true given this situation?
(A) Both objects A and B lose electrons
(B) Both objects A and B gain electrons
(C) Object A loses electrons and object B gains electrons
(D) Object A gains electrons and object B loses electrons
44. The study of electrostatics is based on
(A) Ohm’s Law
(B) Coulomb’s Law
(C) Volta’s Law
(D) Edison’s Law
45. If a charged material is induced at 500 volt potential on an isolated SOIC device and the IC capacitance is known to be 8 pF, what is the minimum ionization current needed from an ionizer to neutralize the charge on the device within 5 seconds?
(A) 80 nA
(B) 0.8 uA
(C) 800 pA
(D) 8.0 nA
46. What happens when a charged conductor touches the inside of a conductive pail?
(A) Charges are distributed evenly across both the inside and outside of the pail.
(B) Charges are distributed evenly across the inside of the pail.
(C) Charges are transferred to the outside of the pail.
(D) Charges are transferred to the inside of the pail.
47. Using Coulombs Law, what is the electrical field and the potential at 0.5 centimeter away from 2 nano-Coulomb point of charge?
(A) 72 KV/cm; 36 V
(B) 180 KV/m; 1.8 KV
(C) 720 KV/m; 3.6 KV
(D) 180 KV/m; 18 KV
48. If a piece of equipment is sensitive to an ESD spike of 8 kV in magnitude, which of the following components should be used to protect the equipment?
(A) Lightening arrestor
(B) Zener diode with lead lengths
(C) Tranzorb with short lead lengths
(D) Tranzorb with long lead lengths |
