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The purpose of this paper is to study the thermal warpage of a plastic ball grid array (PBGA) mounted on a printed circuit board (PCB) during the reflow process.

A thermal-mechanical coupling method that used finite-element method software (ANSYS 13.1) was performed. Meanwhile, a shadow moiré apparatus (TherMoiré PS200) combined with a heating platform was used for the experimental measurement of the warpage of PBGA according to the JEDEC Standard.

The authors found that the temperature profiles taken from the simulated results and experimental measurement are consistent with each other, only with a little and acceptable difference in the maximum temperatures. Furthermore, the maximum warpage measurements during the reflow process are 0.157 mm and 0.149 mm for simulation and experimental measurements, respectively, with a small 5.37 per cent difference. The experimental measurement and simulated results are well correlated. Based on the validated finite element model, two factors, namely, the thickness and dimension of PCB, are explored about their effect on the thermal warpage of PBGA mounted on PCB during the reflow process.

The paper provides a thorough parametrical study of the thermal warpage of PBGA mounted on PCB during the reflow process.

The findings in this paper illustrate methods of warpage study by combination of thermal-mechanical finite element simulation and experimental measurement, which can provide good guidelines of the PCB design in the perspective of thermal warpage during the reflow process.

Small and medium-sized exporters (SMEs) are driven to develop a network entry strategy to tap into a new foreign market. The purpose of this paper is to draw on the network perspective to evaluate how a network gatekeeper facilitates a foreign SME exporter’s entry into local business networks in China.

The single case study method was adopted. The Ule New Zealand Mall, an online shopping platform that sells New Zealand products in China, was selected in this case study. The authors applied the critical incident technique to evaluate the position of New Zealand Post (as a home country-based network gatekeeper), the roles within the position, and the key outcome of the network gatekeeping.

The study discovers two key roles of network gatekeepers: bridging the gap in trust between outsider networks and insider networks; and reducing the costs of experiential learning for SME exporters. Finally, this study concludes that the “brokered insidership” position acquired by SME exporters is the key outcome of network gatekeeping in foreign market entry.

This study advances the understanding of theories of structural holes, business network and gatekeeping. The authors articulate the critical position assumed by a network gatekeeper in bridging two otherwise disconnected business networks, and their key roles in networking. The study also proposes a new network concept – “brokered insidership”.

To reveal the effective ways for leaders to motivate employees' innovative behaviour in complex environmental situations, the leadership rapport orientation is subdivided into two types of values-based/instrumental rapport orientation. The mechanism of supervisor developmental feedback in mediating between leadership rapport orientation and employees' innovative behaviour and the moderating effect of ambidextrous environments is explored. This paper aims to discuss the aforementioned objective.

Leadership rapport orientation is divided into value-based and instrumental rapport orientation to reveal effective ways for leaders to motivate employees' innovative behaviour in complex environmental situations.

The results show that the values-based (instrumental) rapport orientation of leaders impacts employees' innovative behaviour positively (negatively).

Leaders' values-based/instrumental rapport orientation indirectly influences employees' innovative behaviour through supervisor developmental feedback, which positively moderates the relationship between the values-based or instrumental rapport orientation of leaders and employees' innovative behaviour and further moderates the partially mediating role of supervisor developmental feedback between leaders' values-based/instrumental rapport orientation and employees' innovative behaviour.