FEA


FEAT RE ATURE


IIN


NTERCONNE


ONNECTIION ON Narrow Pitch


to a thickness of0.2μmfollowed by a porosity pre


revention tre plating completely cov


reatment ensuring that the gold overs the contact


go


negating any possibility of areas for contamination to deve


velop.


Themating of the socket andheader causes a compression (bellow contact faces toge pre


ressure and pro


shock and vibration. Panasonicmakes use of theUBTS principles across all its connectors, utilising this type of technology vagy vastly increases the number of possible insertions over themore


ov RobDixo Ro


Rob Dixon,Proxon, Productroduct new


T ctManager ew appro chfor v ry loverylowsign lev roachforvery ow sig


he connector is probably one of themost ov


the design and re


nage – Rel ysRelays & Connectorctors,Panaso tobeswitchwiitchedreia ly in


over-looked componentswhen considering reliability of an application, not


because it is the least important-paradoxically a failurewill have immediate effect on the correct functioning of the circ


rcuit.However it is ow


certainly true that it is a componentwhose specification tends to be easily decided. In reality connectors are re terms of re


re required to offer a long life in reliable connection under themost


arduous of conditionswhilst being available at the lowest cost. In considera


the technical requirements itmust be recognised that they are not-unlike


ration of the nature of ke a relay or


switch-single point connection devices.Rather they are


remulti-point connections, often


hundreds ofways, thatmust eachbe 100% reliable.Afailure


well cause a complete circ narro board to board re.


re of any single connection could rcuit failure


Withthe industry demands to decrease th e rowpitchconnector sizes, especially on the rd connector types, the demands


re


ge, this can be achievedwithre effort since the contact surf suitable size.How decre in ord


reasesmore design factors rder to ge


get the necessary


design a product suitable for very low levels to be switched re this need for highre


ve reliably. In re reliability, and the 26 26 JUNE 201 JUNE 2016 | ELEC RO ELECTRONICS CS


rofiles heights of 1.5mmo owr lower and connector pitches of0.35mmit can be seen that a newapproachmust be considered to owsignals


pro recognition of


contact angle and surface area. Withnarrow


reliability is proportional to the contact area. In a physically large connector, e.g. Card edge


reasonable rface can be of a owever as th ove overa


start to emerge rall size


ry contact pressure, re owpitchconnectors nowoffering ge


Panasonic has inve consequences of a


ve


ger–Re ys&Connect rs Panasonic Electric Works UKco gnal levels toevelstobesw ch


relliablyinmodern UBTS (unique bellows type structure


ny type of contact failure, vested in development of the ow


re) contact


design. TheUBTS contact is a complex design specifically to ensure ahighdegree of reliability and stability in the contact area. Withlower quality connect contacts can consist of little than straight pins clamping i a ‘y’ shapedhousing. This can lead to problems in contact contamination building up over a period of time or the point contact not offering This


re


o h m


“Th UBTS fo The TS contact


may not cause pro 100%connection.


relativelyhighvotage leve where


re the contamination


may be ‘punched through’, abov


ove the 10vdc level for


example, how cause an appare


on the actual connection points has dramatically muchlow increased. This is because the contact resistance and re


owever it can certa rent open circu


ower signal


levels are rc


present.


DEAL NG DEALIINGWIITHDESIGNISSUES Another pro


connectorswhen considering resistance to impact torsion. This can be amaj


roblemoccurs in lower quality re


TH DESIGN ISSUES ow


ajor problemin


portable applications (automotive, laptop computer ormobile phone applications for example).Althoughthismay not re


ge result in a


permanent disconnection it is possible that a temporary the circ


to the detriment of other part application.


ry break can causemis-operation of rcuit or spurious signals to be generated rts of the


TheUBTS contact design utilises a unique formon bothsides of the contact. In essence boththe socke


ket andheader port rtion contacts


roblems at l ge


vels


design utilises a unique formon both sides of the contact. In essence both the socket and header portion contacts are fo


formedwith


a series of rounded bends...”


Figure 1:


Figure 1: devices


Panasonic UBTS anasonic U TS connectors in wearable


connectors in wearable devices


sonicElectricWo ksWorksUKconsiders rnelectroctro csyssystystems


troniic syste considers a rsa HE UB re basic styles . THEUBT PRINCIPLES BTS PRINCIPLES


Althoughoffering veryhighre ve


rove reliability levels


rowpitchconnectors.Anew‘V-Notch’ principle has been tested and prov


theUBTS principles have been further improved on themost recent ranges of narro


ro remove oven and is


nowbeing introduced to the current product range is re


romthe header side of the


connector contact at the point ofmating. lity of contamination is effectively isolated


ting point This avoids any possibi


i h a ther areas of the connector.


usly the connector becomes eve n imperv


rvious to the stre


o o


rc resses of


vement and bending since the ‘V- tch’ principle effect incre rce require


reases the


e h


oints to break. Furt liability is incre amfering nature


ge


red to allowthe contact rther the


reased due to the re of the ‘V-Notch’


eachsingle contact point can act a bifurcated edge–that is tw dual points of contact. In tests out by Panasonic involving


two vo


d bre u


reaking a socket andheader ted atmosphere itwas shown


ow


kemany components the narrowpitch connector is constantly being evolvevoved and improvedwhilst themarke demand low The incre


that the V Notch’ contact had a farmore stable contact re version. Like


ow rove


ower costs and smaller packages. reasing use of board to board


ket continues to ge


connectors, bothfloati ensures thatmanufacture


row


ng and direct types, rd


rd rerswill continue t o


invest time and effort into producingmore efficient types of narro suit the electro


ronic industry’s require Panasonic Electric Works UK


www.panasonic-electric-works.com/uk T: 01908 231555


www.panasonic-electric-works.com/uk rements.


owpitchconnectors to ry


resistance than the standard rd


ges. In principle a ‘V’ shaped notchportion ved fro


ows) effect that forces the gether ensuring ahighcontact roviding suspension against


/ ELECTRONICS


ELECTRONICS


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