Page 40
www.us-tech.com
High mass, heat-sinking, lead-free PCBs have met their match.
PACE introduces the PH 100 low profile IR preheater for the most challenging PCBs
The PACE PH100 is a high powered (1600W), non-contact infrared heating system with an ergonomic, low-profile design which permits operators to safely pre-heat PCBs for fast, efficient soldering, rework or repair
Features:
• Sleek, incredibly low working height improves operator comfort and reduces fatigue, perfect for under microscope
• Intuitive 3.5" resistive Touch Screen Display for all operations • Large 300mm x 300mm (11.8" x 11.8") heating area
1-877-882-7223
www.paceworldwide.com
August, 2016
Market for Lithium Ion Batteries is Booming
Continued from page 6
circuitry to prevent or mitigate cell failures, the last resort is typically a mechanical safety vent that releases the internal pressure of the cell or pack when a specified pressure is reached. One of the most popular pres-
sure relief devices for lower-pressure applications the rupture disk. Also known as a pressure safety disk or burst diaphragm, the rupture disk is a passive pressure relief device long adopted by the Oil, Gas and Chemi- cal process industries to protect pres- sure vessels, tanks and other equip- ment from over-pressurization. Rup- ture disks are available in various designs, sizes, shapes and set pres- sures and can be installed on cylin- drical, button, prismatic, or pouch cell designs. However, as battery cells become
increasingly smaller, so must the rup- ture disks that protect them. This is driving the need for miniaturized rup- ture disks as small as 1/8 in. (3.2 mm) and challenging an industry in which products for many decades have been measured in inches. “As pressure relief devices be-
Soldering, Desoldering and Rework Solutions Since 1958.
come increasingly miniaturized, the rupture disk industry is running squarely into design and raw materi- al challenges that often require re- engineering the product itself,” says Geof Brazier, managing director of BS&B Safety Systems, custom-engi- neered products division, a supplier of rupture disks that has been in- volved in the lithium battery indus- try for more than 30 years. According to Brazier, this is due
to a delicate balancing act between the shrinking diameters of the burst area, the limitations of the specific raw ma- terials utilized for the membrane, and the variations in designs required at low, medium and high pressures.
The Challenge of Miniaturization Miniaturization of rupture
disks presents unique challenges, best met utilizing reverse buckling
Neu Dynamics Corp is an ISO 9001:2008 certified Tool, Mold and Die man- ufacturer
specializing in tooling and equipment used in building
Semiconductors, Electronics, components and a wide variety of the devices used in automotive, telecommunications, solar and medical applications. We further offer small to medium volume contract molding services for
microelectronic packages such as BGA, QFN, MLP, optical components etc. We also have capability to provide insert molding services for items such as connectors.
CONTRACT MOLDING OVERMOLDING TOOLING
Phone 215-355-2460 CUSTOM MACHINING
MOLD DESIGN AND FABRICATION
WWW.NEUDYNAMICS.COM SALES@NEUDYNAMICS.COM
Fax 215-355-7365
technology, says Brazier. Unlike tra- ditional forward-acting disks where the load is applied to the concave side of a dome, in a reverse buckling de- sign, the dome is inverted toward the source of the load. Reverse buckling disks are typically sturdier than for- ward-acting disks which are thin and difficult to handle, and as a result have greater longevity, accuracy and reliability over time. “As burst diameters decrease
dramatically, it becomes challenging to design a reverse buckling disk that will reliably collapse through such small orifice sizes,” Brazier ex- plains. “In many ways it can be like trying to fit a camel through the eye of a needle.” To resolve this issue, BS&B has created novel structures that control the reversal of the rup- ture disk to always collapse in a pre- dictable manner. This includes, for example, a
hybrid shape that combines reverse buckling and forward bulging char- acteristics that are pre-collapsed. In this type of design, a line of weakness is typically placed into the rupture disk structure to define a specific opening flow area when the reverse type disk activates. Small, nominal size rupture
disks are sensitive to the detailed characteristics of the orifice through which they burst, which requires close cooperation between the rup- ture disk manufacturer and the user to achieve the optimum mounting and installation arrangement. “With small size pressure relief devices, the influence of every feature of both the rupture disk and its holder is ampli- fied,” explains Brazier. For miniatur- ized products, BS&B manufactures the rupture disk from stainless steel, aluminum and nickel alloys to achieve compatibility with lithium battery operating conditions. Contact: BS&B Safety Systems
at 7455 E 46th Street, Tulsa, OK 74145-6379, (918) 622-5950, e-mail:
sales@bsbsystems.com or visit
www.bsbsystems.com r
Advanced Screening for Bombs and Nuclear Threats
Continued from page 8
ping through the supply chain,” Ledoux says. Seeing that the world was ripe
for NRF-based scanners, Bertozzi launched Passport with friend Gor- don Baty, who is now chair of Pass- port’s board of directors. They pulled in Ledoux as CEO and set up shop in Ledoux’s home office. However, although they could
NDC International offers specialized equipment built for today's high-tech semiconductor assembly processes.
HANMI SEMICONDUCTOR
MPP MANUAL WIRE BONDERS
K&S CAPILLARIES K&S DICING BLADES
MASTER MACHINERY CUSTOM AUTOMATION RGT WAFER FRAMES
RGT MANUAL WAFER MOUNTER
WWW.NDC-INT.COM
prove the technology theoretically, there was nowhere to test it on a large scale. One day Ledoux was on MIT’s
campus, speaking with a fellow alum about Passport’s testing issues, when the alum pointed to MIT’s High Voltage Research Laboratory, which was supposedly shut down. “We were literally right across the street,” Ledoux says. “So we walked over and rang the doorbell.” Turns out, the facility was still in use. “It became only the third place in the
country that we could do the experi- ments,” Bertozzi says. In the early 2000s, the small
team including Bertozzi and Ledoux recorded the unique signals of all ac- tinides. From there, the project grew steadily. In 2007 and 2008, Passport received Department of Homeland Security contracts to test their cargo scanner at its headquarters in Biller- ica. In 2009, Passport received a De- partment of Homeland Security con- tract to build their SmartScan sys- tem.
The company’s latest Depart-
ment of Homeland Security contract, issued in 2013, is for building a sys- tem that fuses gamma radiation-de- tection data with video, to track radi- ation in vehicles traveling at high- way speeds. Web:
http://news.mit.edu/2016/
startup-improved-nuclear-threat-de- tection-0622 and
https://www.passportsystems.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88