Sunday, November 30, 2014
Shenzhen Jesen Industrial Co.,Ltd.
Friday, November 28, 2014
Earthlings to send 90,000 hellos to Mars
Space-funding company Uwingu will beam nearly 90,000 messages to Mars on Nov. 28, the 50th anniversary of the launch of NASA's Mariner 4 Red Planet mission.
By Irene Klotz
(Reuters) - Radio telescopes on Earth will beam 90,000 messages to Mars on Friday to commemorate the launch 50 years ago of the first robotic probe to visit the planet.
A U.S. space funding company called Uwingu organized the extraterrestrial shout-out to mark the 50th anniversary of NASA’s Mariner 4 mission and to raise funds for its other projects.
Uwingu’s “Beam Me To Mars” initiative invited interested participants to send digital radio-wave transmissions of their names, messages and pictures to Mars for fees ranging from $5 to $99.
The effort attracted several celebrities including actor and comedian Seth Green and actor George Takei, who portrayed Mr. Sulu on the television series “Star Trek.”
The transmission is scheduled to begin just after 3 p.m. EST/2000 GMT on Friday. Traveling at the speed of light, the messages will take 15 minutes to reach Mars. The entire transmission will be repeated twice.
While there is no one on Mars to answer the call, project organizers say that is beside the point.
Copies of the messages will be delivered to Congress, to NASA headquarters in Washington, and the United Nations in New York as a show of support for space exploration.
“Though no one is on Mars yet to receive the messages, here on Earth people will hear them loud and clear,” Uwingu wrote on the project website.
Uwingu, pronounced “oo-wing-goo” which means “sky” in Swahili, is a privately owned company that raises money to fund space research and educational outreach projects.
Since Mariner 4’s successful flyby of Mars, returning the first pictures of the planet’s surface, more than 20 other spacecraft have successfully visited, orbited or landed on the planet’s surface.
NASA currently has three orbiters and two rovers working on Mars, and the European Space Agency and India each have one Mars orbiter.
The long-term goal of the U.S. space program is to land astronauts on the Red Planet.
(Reporting by Irene Klotz in Boca Raton, Florida; Editing by Barbara Goldberg in New York and Cynthia Osterman)
What is Rigid-Flex printed circuit
A Rigid-Flex Printed Circuit could be defined as"a printed circuit device which has areas of rigid and flexible dielectrics with coextensive conductors throughout and interconnected by plated-through-hole(PTH)". The most common type of Rigid-Flex consists of a rigid printed circuit board(PCB) with flexible appendages extending and terminating at connectors. The rigid sections serve as strain reliefs, stiffeners and provide selective support for components; While the flex areas serve as an interconnection assembly.
Rigid-flex is different from a flexible circuit with an added stiffener. Rigid-flex incorporates plated through-holes that extend through the entire rigid section, there are challenges to create a robust and reliable plated through-hole interconnect which like a rigid board. As with rigid boards, we can also incorporate microvias using HDI process technologies to take advantage of today's most advanced packaging components.
The flexible sections typically do not have plated through-holes(PTHs) to avoid reducing flexibility. However, some designs may require "sub laminations" with plated through-holes or microvias. Another design may have inner layers that terminate with plated through-holes for receiving soldered connectors. Obviously, these requirements will add complexity to the design.
Rigid-flex is different from a flexible circuit with an added stiffener. Rigid-flex incorporates plated through-holes that extend through the entire rigid section, there are challenges to create a robust and reliable plated through-hole interconnect which like a rigid board. As with rigid boards, we can also incorporate microvias using HDI process technologies to take advantage of today's most advanced packaging components.
The flexible sections typically do not have plated through-holes(PTHs) to avoid reducing flexibility. However, some designs may require "sub laminations" with plated through-holes or microvias. Another design may have inner layers that terminate with plated through-holes for receiving soldered connectors. Obviously, these requirements will add complexity to the design.
Copper Foil Type
The preferred copper foil for flex circuits is a wrought rolled annealed . This copper has excellent ductility and elongation properties and offers:
High resistance to cracking during flexing
High resistance to foil fractures in PTHs during thermal exposure.
High resistance to cracking during flexing
High resistance to foil fractures in PTHs during thermal exposure.
Covercoat
A preferred choice with a proven history would be DuPont Pyralux LF. Acrylic adhesive is coated onto a polyimide dielectric film (DuPont Kapton) in a B-stage form. For rigid-flex manufacturing and long-term service life, the material has the following desirable properties:
High bond strength to treated copper surfaces
9-10 lbs./in. (maintains value after solder)
Dielectric strength >3000 volts/mil
Dielectric constant = 3.5
Passes 10-second solder float at 288oC
Passes MIL-P-50884 qualification of 100,000 cycles
Most PCB chemicals have negligible effect on material
Good electrical properties
Good thermal properties
Good flex endurance capability
Good chemical resistance
High bond strength to treated copper surfaces
9-10 lbs./in. (maintains value after solder)
Dielectric strength >3000 volts/mil
Dielectric constant = 3.5
Passes 10-second solder float at 288oC
Passes MIL-P-50884 qualification of 100,000 cycles
Most PCB chemicals have negligible effect on material
Good electrical properties
Good thermal properties
Good flex endurance capability
Good chemical resistance
Rigid Metal-Clad Laminates
Generally, two resin systems (epoxy and polyimide) are used for rigid copper clad laminates. These materials are generally referred to as:
For epoxy resin systems (most common): IPC-4101/21, /24, /26, /28
For polyimide resin systems: IPC-4101/40, /41, /42 (/41 preferred)
For epoxy resin systems (most common): IPC-4101/21, /24, /26, /28
For polyimide resin systems: IPC-4101/40, /41, /42 (/41 preferred)
Christian Bale on Studying Moses: He Was a 'Freedom Fighter' for Hebrews, 'Terrorist' to Egyptian Empire
Christian Bale on Studying Moses: He Was a 'Freedom Fighter' for Hebrews, 'Terrorist' to Egyptian Empire (ABC News)
To prepare for the role of Moses for the upcoming film, “Exodus: Gods and Kings,” Christian Bale studied the biblical story, and came to realize that Moses was a very complicated figure.
“He was so much more human than I had ever imagined... had all sort of temptations and indulgences that he had grown up with,” Bale said in an interview with “Nightline.” “[He was] absolutely seen as a freedom fighter for the Hebrews, but a terrorist in terms of the Egyptian empire.”
Moses has been an inspirational icon for liberation movements throughout history, and is a central figure in the three Great Abrahamic faiths – Judaism, Christianity and Islam.
“What would happen to Moses if he arrived today?” Bale pondered. “Drones would be sent out after him, right?”
Ridley Scott, who directed “Exodus: Gods and Kings,” depicted another ancient empire in upheaval in the 2000 movie, “Gladiator.” He teamed up with frequent collaborator Steve Zaillian, who wrote the script, for “Exodus: Gods and Kings.”
“What he is writing is a story of revolution,” Bale said. “And that’s a story that can resonate, no matter what time.”
Watch ABC’s Chris Connelly’s full interview with Christian Bale and Ridley Scott in an upcoming “Nightline” feature.http://www.jesen.com.cnView photo
Thursday, November 27, 2014
Rigid-Flex Printed Circuit Capabilities
We utilize the best technologies and tools at our disposal to create rigid-flex circuit boards of the best quality. Our advanced manufacturing facility ensures that the quality of our products never diminishes. Jesen offer a variety of surface finishes, materials and capabilities to meet customer specifications. An overview of our specifications are as follows:
In executive 'amnesty' move, Obama pardons turkeys 'Mac' and 'Cheese'
Joking that “some will call this amnesty,” President Barack Obama on Wednesday took part in one of the oddest traditions in American politics: The pardoning of two turkeys, “Mac” and “Cheese,” who will be spared from a Thanksgiving roasting.
“I am here to announce what I’m sure will be the most talked-about executive action this month,” Obama declared with a smile in a thinly veiled reference to the controversy over last week's immigration announcement.
“Today, I’m taking an action fully within my legal authority, the same kind of action taken by Democratic and Republican presidents before me, to spare the lives of two turkeys.”
“Some will call this amnesty, but don’t worry, there’s plenty of turkey to go around,” Obama said at the ceremony, which was driven indoors by bad weather.
Both birds came from Cooper Farms in Oakwood, Ohio. And in fact, both birds will live out their days on a farm outside Washington, DC., but they may not have a long retirement. Turkeys bred for the table are fat and short-lived, meaning that either way it’s probably their last Thanksgiving.
“Let’s face it, If you’re a turkey and you’re named after a side dish, your chances of escaping Thanksgiving dinner are pretty low,” the president said. “So these guys are well ahead of the curve, they really beat the odds.”
In a move sure to make critics cry fowl, Mac and Cheese spent the night at the posh Willard Hotel, big-donor style, before getting their VIP trip to the White House and their presidential pardon. (Don’t laugh: The Butterball PAC spent a bit more than $38,000 in the 2014 cycle).
The credit – or blame – for this odd tradition falls to George H. W. Bush. Sure, the Great Emancipator, Abraham Lincoln himself, supposedly spared a turkey at the request of his son Tad, according to what the White House bills as the “definitive history” of the bizarre ritual. But it was Bush who started the modern version, announcing on Nov. 14, 1989 that the turkey had “been granted a presidential pardon.” So the bird was spared the oven and went instead, ironically, to “Frying Pan Park” in Herndon, Virginia.
CLICK IMAGE for slideshow: President Harry S. Truman squints as he fingers the wattle of a 35-pound Tom Turkey …
The day’s events brought Obama’s pardon total to 12 turkeys and just 52 people, according to records kept by CBS News's Mark Knoller. The president is famously sparing with clemency for humans.
Obama, who was to join his wife and teenage daughters at a food pantry later in the day, acknowledged that “it is a little puzzling that I do this every year.”
But, he said, “with all the tough stuff that swirls around in this office, it’s nice once in a while just to say ‘Happy Thanksgiving!.”http://www.jesen.com.cn/en/contact.asp
Wednesday, November 26, 2014
Rigid Flexible Circuits
What is Rigid-Flex printed circuit
A Rigid-Flex Printed Circuit could be defined as"a printed circuit device which has areas of rigid and flexible dielectrics with coextensive conductors throughout and interconnected by plated-through-hole(PTH)". The most common type of Rigid-Flex consists of a rigid printed circuit board(PCB) with flexible appendages extending and terminating at connectors. The rigid sections serve as strain reliefs, stiffeners and provide selective support for components; While the flex areas serve as an interconnection assembly.
Rigid-flex is different from a flexible circuit with an added stiffener. Rigid-flex incorporates plated through-holes that extend through the entire rigid section, there are challenges to create a robust and reliable plated through-hole interconnect which like a rigid board. As with rigid boards, we can also incorporate microvias using HDI process technologies to take advantage of today's most advanced packaging components.
The flexible sections typically do not have plated through-holes(PTHs) to avoid reducing flexibility. However, some designs may require "sub laminations" with plated through-holes or microvias. Another design may have inner layers that terminate with plated through-holes for receiving soldered connectors. Obviously, these requirements will add complexity to the design.
A Rigid-Flex Printed Circuit could be defined as"a printed circuit device which has areas of rigid and flexible dielectrics with coextensive conductors throughout and interconnected by plated-through-hole(PTH)". The most common type of Rigid-Flex consists of a rigid printed circuit board(PCB) with flexible appendages extending and terminating at connectors. The rigid sections serve as strain reliefs, stiffeners and provide selective support for components; While the flex areas serve as an interconnection assembly.
Rigid-flex is different from a flexible circuit with an added stiffener. Rigid-flex incorporates plated through-holes that extend through the entire rigid section, there are challenges to create a robust and reliable plated through-hole interconnect which like a rigid board. As with rigid boards, we can also incorporate microvias using HDI process technologies to take advantage of today's most advanced packaging components.
The flexible sections typically do not have plated through-holes(PTHs) to avoid reducing flexibility. However, some designs may require "sub laminations" with plated through-holes or microvias. Another design may have inner layers that terminate with plated through-holes for receiving soldered connectors. Obviously, these requirements will add complexity to the design.
Rigid-flex is different from a flexible circuit with an added stiffener. Rigid-flex incorporates plated through-holes that extend through the entire rigid section, there are challenges to create a robust and reliable plated through-hole interconnect which like a rigid board. As with rigid boards, we can also incorporate microvias using HDI process technologies to take advantage of today's most advanced packaging components.
The flexible sections typically do not have plated through-holes(PTHs) to avoid reducing flexibility. However, some designs may require "sub laminations" with plated through-holes or microvias. Another design may have inner layers that terminate with plated through-holes for receiving soldered connectors. Obviously, these requirements will add complexity to the design.
Copper Foil Type
The preferred copper foil for flex circuits is a wrought rolled annealed . This copper has excellent ductility and elongation properties and offers:
High resistance to cracking during flexing
High resistance to foil fractures in PTHs during thermal exposure.
The preferred copper foil for flex circuits is a wrought rolled annealed . This copper has excellent ductility and elongation properties and offers:
High resistance to cracking during flexing
High resistance to foil fractures in PTHs during thermal exposure.
High resistance to cracking during flexing
High resistance to foil fractures in PTHs during thermal exposure.
Covercoat
A preferred choice with a proven history would be DuPont Pyralux LF. Acrylic adhesive is coated onto a polyimide dielectric film (DuPont Kapton) in a B-stage form. For rigid-flex manufacturing and long-term service life, the material has the following desirable properties:
High bond strength to treated copper surfaces
9-10 lbs./in. (maintains value after solder)
Dielectric strength >3000 volts/mil
Dielectric constant = 3.5
Passes 10-second solder float at 288oC
Passes MIL-P-50884 qualification of 100,000 cycles
Most PCB chemicals have negligible effect on material
Good electrical properties
Good thermal properties
Good flex endurance capability
Good chemical resistance
A preferred choice with a proven history would be DuPont Pyralux LF. Acrylic adhesive is coated onto a polyimide dielectric film (DuPont Kapton) in a B-stage form. For rigid-flex manufacturing and long-term service life, the material has the following desirable properties:
High bond strength to treated copper surfaces
9-10 lbs./in. (maintains value after solder)
Dielectric strength >3000 volts/mil
Dielectric constant = 3.5
Passes 10-second solder float at 288oC
Passes MIL-P-50884 qualification of 100,000 cycles
Most PCB chemicals have negligible effect on material
Good electrical properties
Good thermal properties
Good flex endurance capability
Good chemical resistance
High bond strength to treated copper surfaces
9-10 lbs./in. (maintains value after solder)
Dielectric strength >3000 volts/mil
Dielectric constant = 3.5
Passes 10-second solder float at 288oC
Passes MIL-P-50884 qualification of 100,000 cycles
Most PCB chemicals have negligible effect on material
Good electrical properties
Good thermal properties
Good flex endurance capability
Good chemical resistance
Rigid Metal-Clad Laminateshttp://www.jesen.com.cn/en/RFC-Definition.asp
Generally, two resin systems (epoxy and polyimide) are used for rigid copper clad laminates. These materials are generally referred to as:
For epoxy resin systems (most common): IPC-4101/21, /24, /26, /28
For polyimide resin systems: IPC-4101/40, /41, /42 (/41 preferred)
Generally, two resin systems (epoxy and polyimide) are used for rigid copper clad laminates. These materials are generally referred to as:
For epoxy resin systems (most common): IPC-4101/21, /24, /26, /28
For polyimide resin systems: IPC-4101/40, /41, /42 (/41 preferred)
For epoxy resin systems (most common): IPC-4101/21, /24, /26, /28
For polyimide resin systems: IPC-4101/40, /41, /42 (/41 preferred)
Hong Kong student leaders arrested as police clear protest site
By Farah Master and James Pomfret
HONG KONG (Reuters) - Hong Kong police cleared activists from one of the largest protest sites in the city on Wednesday and arrested Joshua Wong and Lester Shum, two of the student leaders at the heart of the pro-democracy movement that has shaken the Asian financial hub.
Scuffles broke out when riot police moved against hundreds of protesters on Nathan Road, in the gritty Mong Kok district, following clashes overnight, Reuters witnesses said.
"You can't defeat the protesters' hearts!" screamed Liu Yuk-lin, a 52-year-old protester in a hard hat holding a yellow umbrella, the symbol of the movement, as she stood before lines of police in helmets and goggles.
But there was no serious violence, and after about three hours the operation was complete and traffic was flowing through as area where demonstrators had camped out since late September to call for greater democracy in the former British colony.
Mong Kok has been a flashpoint for clashes between students and mobs intent on breaking up the protests, which have posed one of the biggest challenges to China's Communist Party leaders since the crushing of student-led pro-democracy demonstrations in Beijing in 1989.
Crowds nearby cheered and clapped as the final protesters were removed from the site on Wednesday.
Earlier, court-appointed bailiffs had warned protesters to leave and around 80 workers in red caps and "I love Hong Kong" T-shirts began clearing metal and wooden barricades laid across Nathan Road, where hundreds of tents had been erected in a two-month civil disobedience campaign.
They had been met by hundreds of protesters brandishing yellow banners and chanting for "full democracy".
"If you resist you face possible imprisonment. We warn you to immediately stop resisting," said a policeman into a loud hailer before jeering activists.
Several protesters who resisted were hauled away, witnesses said. Hong Kong's Cable TV said 4,000 police were involved.
A Reuters witness saw police take away Shum, and the Facebook page of the student group Scholarism announced that Wong had been arrested for contempt of court.
Although the protests have had no formal leadership structure, Wong and Shum were part of a group of students who many looked to as the movement's de facto leaders.
"WE HAVE PLAN B"
The clearance of the Mong Kok site is a big breakthrough in the authorities' efforts to end the most tenacious protest movement in Hong Kong's recent history, although it could trigger retaliatory protests elsewhere as the activists regroup.
"It's not the end," said Helen Lau, a young activist with a leather yellow ribbon around her neck, who was shouting at police and demanding to re-enter the cleared area. "We still have plan B; either to occupy other places or to step up our actions."
Protesters still occupy segments of roads, blocking traffic, in the city's Admiralty district near government offices and Causeway Bay, a major shopping area.
It was not clear if or when police might try to clear the remaining protest sites.
Overnight, police had arrested 80 protesters in running clashes in Mong Kok following the clearance of part of a nearby street the previous day.
The crowded, working class district has been the scene of some of the most violent confrontations in the two-month long "Occupy Central" civil disobedience campaign.
The pro-democracy movement is showing signs of splintering, with radical voices calling for escalated action after nearly two months of stalemate in their campaign for full democracy.
In August, Beijing offered the people of Hong Kong, which reverted to Chinese rule in 1997, the chance to vote for their own leader in 2017, but said only two to three candidates could run after getting majority backing from a 1,200-person "nominating committee" stacked with Beijing loyalists.
More than 100,000 people took to the streets at the peak of the protests, but numbers have dropped to a few hundred scattered in tents over three main sites.(
http://www.jesen.com.cn/en/RFC-types.asp
)
(Additional reporting by Twinnie Siu, James Pomfret and Venus Wu; Writing by John Ruwitch; Editing by Alex Richardson)
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